Posts Tagged ‘Mould’

Avoiding Milk and Lactose
Fruit lassi
There are two quite distinct reasons for avoiding milk: either to avoid milk proteins or to avoid

lactose, the sugar found in milk. It is important not to confuse these two because the details of the

avoidance diet required are different. Only a few people need to avoid both milk proteins and lactose.
Diarrhoea and wind in response to drinking milk, but few other symptoms, usually indicates a reaction

to lactose — but a reaction to milk proteins could be an alternative explanation. If it is a reaction

to lactose, this may be due to either primary lactase deficiency or secondary lactase deficiency — your

doctor can order tests to make an exact diagnosis (see p. 79). Note that a bout of diarrhoea, however

caused, often produces a temporary lactose intolerance (secondary lactase deficiency).
Any symptoms other than (or in addition to) diarrhoea and wind strongly suggest a reaction to milk

proteins. This might be a true allergy, another type of immune reaction to milk (see pp. 72-3), or an

idiopathic intolerance reaction (see pp. 76-7). In theory, skin tests should identify true allergic

reactions to milk proteins. Unfortunately, skin tests are not infallible, and it is possible to have a

genuine allergy or other immune reaction to milk proteins, but give negative skin tests. This is

especially common with babies (see p. 65 and p. 69). There are no accurate tests that can confirm

intolerance reactions to milk proteins.
It is possible to have sensitivity to both milk proteins and lactose.
If tests do not give you a definitive answer, you may have to try both types of diet and see which one

works. Remember that lactose intolerance may be only temporary.
Avoiding milk proteins
If you have a sensitivity reaction to cow’s milk proteins, then you need to avoid:
•    milk and all milk-based drinks, including lactose-reduced milk (if you need to avoid lactose as

well, drops and tablets to reduce lactose — see Using lactase replacers, p. 183 — are safe and could be

used with a tolerated milk, e.g. goat’s milk)
•    cream, yoghurt, creme fraiche
•    all kinds of cheese, cottage cheese and cream cheese (some people may be able to tolerate

Norwegian brown cheese, called Gjetost, which is made with milk whey)
•    white sauce, bechamel sauce and other creamy sauces
•    custard, rice pudding and other milk-based puddings
•    almost all home-made cakes, biscuits, cookies, pancakes and pastry
•    some bread, rolls, waffles
•    almost all chocolate
•    casein, casemate, and lactalbumin in packaged foods (see p. 173); you may be able to tolerate

whey but experiment cautiously.
Unless your sensitivity is fairly mild, you will also need to avoid:
•    butter, except clarified butter (ghee)
•    most kinds of margarine (they generally contain milk derivatives, but
some are milk-free — health-food shops are a good source of these).
As long as you do not have a severe allergy to milk, you should be able to tolerate clarified butter.

Make this by melting butter over a low heat, pouring it into a glass jar, and leaving it to cool in the

refrigerator. The milk proteins will settle to the bottom, and be visible as whitish granules — only

eat the clear butter above this level.
Alternatively, put olive oil into a wide-necked container and place in the freezer. It will solidify,

and can be used as a spread in place of butter.
A few of those with cow’s-milk allergy can tolerate sheep’s milk, and possibly (but less commonly)

goat’s milk. However, most people must avoid these as well. (There are also rare individuals who are

allergic to goat’s and sheep’s milk but not to cow’s milk.) Ass’s milk, if you can get it, is tolerated

by most with cow’s-milk allergy. There are many substitutes for cow’s milk now available, such as soya

milk, almond milk, rice milk and hazelnut milk. Try a health-food shop for these. All can be used in

place of ordinary milk when cooking.
Margarine or clarified butter can be used in recipes that call for butter. Soya yoghurt and cream make

reasonable substitutes for ordinary yoghurt and cream.
Avoiding lactose
If you have lactose intolerance, you must avoid:
•    milk and all milk-based drinks, unless lactose-reduced
•    cream, creme fraiche
•    most kinds of yoghurt, especially mild yoghurt. A very strong, acidic yoghurt may contain

little lactose. The bacteria that make yoghurt turn lactose into lactic acid, so the more acidic it is,

the less lactose it contains.
•    cottage cheese and Norwegian brown cheese, or Gjetost. Other kinds of cheese are usually so low

in lactose that they are tolerated. Only those people with extreme lactose intolerance need to avoid

all cheeses.
•    white and bechamel sauce, custard, rice and other milk-based puddings
•    almost all home-made cakes, since milk is generally used for baking. Items cooked with butter

but not milk, such as biscuits, cookies and pastry, are usually tolerated, as is butter itself, and all

margarine.
•    lactose in medicines. Lactose powder is used in many tablets and capsules, just to bulk out the

drugs. The amount used can be sufficient to evoke symptoms in some people with lactase deficiency.

Certain asthma inhalers also contain lactose (see p. 162), and a small amount may be swallowed. The

lactose from inhalers will affect you only if you have severe lactase deficiency.
Soya-based products, and all other nut- or grain-based milk substitutes, are lactose-free. Sheep’s

milk, goat’s milk and other animal milks (including human breast milk) all contain lactose.
Using lactase replacers
Many people with lactose intolerance are able to eat a more varied diet by using lactase replacers.

These provide a temporary supply of the missing enzyme, lactase (see p. 79), which helps out by

digesting the lactose in milky foods. Lactase replacers must be taken at the same time as the milky

food, and are only effective for that one meal. The more lactose there is in the meal or snack, the

more of the lactase replacer you need – trial and error is the only way of working out how much you

need for a particular food. There are a number of different brands of lactase replacer now available,

and it is worth trying out several. Some people find that they are sensitive to an added ingredient in

some brands. Sources of lactase replacers include health-food shops and specialist suppliers – these

can be located through the Internet (see p. 255).
Savoury white sauce
Savoury white sauce is the base of many dishes. Here the flavour of the wine and stock goes well with

chicken, vegetables or fish.
PREPARATION TIME: 7-8 minutes MAKES: approx. 600ml (1 pint)
50g (13/4oz) milk-free baking margarine 50g (1314oz) plain flour
200ml (7fl oz) dry cider or dry white wine 400ml (14f1 oz) vegetable or chicken stock 1 bay leaf, salt

and pepper
Melt the margarine in a small saucepan and stir in the flour. Cook, stirring, over a low heat for
1 minute then stir in the cider or wine, followed by the stock. Add the bay leaf and simmer, stirring

occasionally, for 5 minutes until thickened. Season to taste.
Variations. add approx. 6 tbsp finely chopped herbs, e.g. parsley, chives, tarragon or chervil; or add

English or French mustard; or add lemon juice.
Sweet white sauce
PREPARATION TIME: 5 minutes MAKES: approx. 300ml (’/?pint)
2 tbsp cornflour
25g (1 oz) caster sugar
300ml (V2 pint) apple or white grape juice 4 tbsp soya cream
25g (1oz) milk-free margarine
In a saucepan, mix the cornflour and sugar with a little of the juice to give a smooth paste then

gradually stir in the rest of the juice and bring to a simmer over a low heat. Simmer for 1-2 minutes

until thickened, stirring all the time. Finally, add the soya cream and margarine.
Variations: melt in 1008 (3-/2oz) or more of milk-free chocolate; or add rum or brandy to taste; or add

4-6 pieces finely chopped stem ginger together with 1-2 tbsp of their syrup.
Pancakes
Soya milk has a slightly thicker consistency than cow’s milk and therefore more is used in this pancake

recipe than would be needed in a traditional one.
PREPARATION TIME: 25 minutes MAKES: approx. 16 small pancakes
150g (5V2oz) plain flour, sieved 2 large eggs
pinch salt
450ml (16f1 oz) soya milk
oil or milk-free margarine for frying To serve:
lemon juice and caster sugar or golden syrup
Combine the flour, eggs, salt and soya milk in a liquidiser until smooth. Alternatively place the

flour, eggs and salt in a bowl and slowly whisk in the soya milk to form a thin batter.
Heat approx.1 tsp oil or margarine in an 18cm (7in) non-stick frying pan and swirl until hot. Pour in

sufficient batter to just cover the base of the pan and cook until golden. Turn and cook on the other

side until golden.
Serve with lemon juice and caster sugar or with golden syrup.
Apple and frangipane tart
An alternative to a milk-based custard tart. The combination of apple and almond is delicious. Serve

freshly baked. It can also be eaten cold, but if possible, warm it a
little before serving.
PREPARATION TIME: 30 minutes COOKING TIME: 1-11/4 hours MAKES: 8 servings
Pastry:
175g (6oz) plain flour, sieved
1008 (3 V2oz) milk-free baking margarine, softened
25g (1 oz) caster sugar
Filling:
50g (13/4oz) milk-free sunflower margarine 1008 (3112oz) ground almonds
100g (3112oz) plus 1 tbsp caster sugar 2 egg yolks
2 tbsp dark rum, brandy or orange juice 2 large dessert apples
4 tbsp apricot jam
Work the flour, margarine and sugar together with 1 tbsp cold water to make a soft dough. Roll out and

use to line a deep 20cm (8in) fluted flan tin. Chill this while you prepare the filling.
Preheat the oven to 190′C/375′F/gas mark 5. Beat together the margarine, ground almonds, 100g (3Y2oz)

caster sugar, egg yolks and rum. Peel, core and roughly chop one apple and stir into the mixture.

Spread this in the pastry case. Core and thinly slice the remaining apple and arrange the slices on

top. Sprinkle with the remaining sugar and bake for 1-1′/’4 hours until risen and golden. Cool slightly

then brush the surface with the apricot jam (warm this gently in a saucepan first).
Coconut rice pudding with mango
This pudding is based on a Thai recipe. The rice pudding will become thicker the longer it cooks and

also as it cools. Make sure the mango is ripe.
COOKING TIME: 30-40 minutes MAKES: 6 servings
175g (6oz) pudding rice, rinsed 50-75g (131-2314oz) sugar
1 litre (13/4 pints) carton rice milk 400ml (14f1 oz) coconut milk To serve:
1 extra-large ripe mango, peeled and diced
toasted coconut shreds
Place the rice in a large saucepan with 50g (13/4oz) of the sugar and the rice milk and coconut milk.

Bring to a simmer, stirring. Simmer gently for 30-40 minutes, stirring occasionally, until the rice is

cooked and the milk absorbed. Add the extra sugar if wished. Serve warm or cold, topped with mango and

toasted coconut.
Baked strawberry creams with strawberry sauce
The riper the strawberries the better, to give intensity to both the creams and the sauce.
PREPARATION TIME: 30 minutes COOKING TIME: 20-25 minutes MAKES: 6
1008 (3112oz) caster sugar
4 tbsp Muscat wine
1 tsp lemon juice
350g (12oz) strawberries, hulled and sliced
4 large eggs, beaten Sauce:
225g (Boz) strawberries, hulled and chopped
2 tbsp icing sugar 2 tbsp Muscat wine To serve:
a few whole strawberries
Preheat the oven to 1 70′C/325′F/gas mark 3. Set six 1 50ml (Y4 pint) ramekins in a small roasting tin.

If you plan to unmould the creams, oil the ramekins lightly.
Place the sugar, wine, lemon juice and strawberries in a saucepan and heat gently to dissolve the

sugar. Bring to the boil and cook, uncovered, for 5 minutes. Cool slightly then puree in a liquidiser

and whisk into the beaten eggs. Pass through a sieve then pour into the ramekin dishes.
Pour hot water from a kettle around the ramekins and cook in the centre of the oven for 20-25 minutes

until lightly set.
Remove the dishes from the tin and allow to cool. Chill, if wished.
Combine all the sauce ingredients and liquidise until smooth. Pass through a fine sieve.
Serve the creams in the ramekins with a little sauce poured on top and decorated with a whole

strawberry, or carefully unmould, pour a little sauce over, then decorate with a whole strawberry.
Variation: oil the ramekins. Dissolve 100g (31/2oz) caster sugar in 4 tbsp water in a small saucepan

over gentle heat, then cook to a rich caramel without stirring. Pour a little caramel into each oiled

ramekin then continue as above. Pour the wine for the sauce into the pan used to make the caramel and

warm gently to dissolve any leftover caramel, then continue with the sauce as above.
Frozen vanilla dessert
This is a cross between a sorbet and an ice cream.
PREPARATION TIME: 30 minutes, plus freezing MAKES: 4-6 servings
1 vanilla pod, split
150g (51/2oz) caster sugar 500g carton soya yoghurt
Place the vanilla pod and sugar in a saucepan with 300ml (1/2 pint) water. Dissolve over gentle heat

then bring to a simmer and simmer for 20 minutes. Leave to cool then remove the pod, scraping all the

seeds from it and returning them to the syrup. Beat in the soya yoghurt and freeze.
You will get the best texture by using an ice-cream machine. Alternatively, freeze in a plastic

container then remove from the freezer and beat the mixture well until smooth (you can do this in a

food processor). Return to the freezer. Repeat this process once or twice.
Baked strawberry cream with strawberry sauce
Variations: add 100g (31/2oz) melted plain chocolate; or add 2 tbsp instant espresso coffee dissolved

in 2 tbsp hot water. Alternatively, dissolve 100g (3/2oz) caster sugar over a gentle heat in a small

saucepan until it turns to a rich caramel; then add 100g (31/2oz) unblanched almonds and stir with a

metal spoon until they start to pop. Transfer to an oiled tray and leave to set. Crush roughly and add

to the basic mixture.
Fruit lassi
This refreshing Indian drink can also be made with frozen fruit, in which case don’t use iced water –

cold will do.
PREPARATION TIME: 10 minutes
MAKES: approx. 1.35 litres (21/4 pints)
500g carton soya yoghurt
50-75g (1314-231aoz) sugar
225g (8oz) berries such as raspberries, strawberries, blackberries or blueberries or the equivalent

weight of chopped fruit such as mango, peach or papaya
600ml (1 pint) iced water
Place all the ingredients in a liquidiser and blend until smooth.
Frozen vanilla desert
Banana and strawberry shake
A special treat for a child who cannot have milk.
PREPARATION TIME: 5 minutes MAKES: 600ml (I pint)
2 large, very ripe bananas
150g (5112oz) strawberries
1112 tbsp olive oil
a little nutmeg or other spice, if liked 200ml (7fl oz) water
Peel the bananas and roughly chop the fruit. Combine all the ingredients in a blender until very

smooth. Serve immediately, or cover tightly and store in the refrigerator.
Variations: use a nectarine or a skinned peach instead of strawberries; use coconut milk (available in

tins) instead of olive oil, and the flesh of a small mango, or half a large mango, instead of

strawberries.

Allergens and irritants at work
Some workplaces have very high concentrations of allergens in the air, especially if proper safety procedures are not being followed. Occupational allergies can begin with symptoms in the nose, such as sneezing, blockage or constant streaming (allergic rhinitis). You may also suffer with itchy or watery eyes (conjunctivitis), a cough, sweating and a feverish feeling. Alternatively, direct contact with the allergen can produce a skin rash (dermatitis) or itchiness and swelling (contact urticaria/nettle rash and angioedema).
If you work somewhere with an allergy risk (see pp. 133-4), be vigilant for such symptoms and see your doctor immediately. These symptoms can be the forerunners of occupational asthma, which is a serious and potentially irreversible problem. Some allergens, such as latex, can even produce anaphylactic shock (a life-threatening allergic collapse).
Skin-prick tests (see p. 91) can show if you have an allergy to a substance encountered at work.
Acting promptly gives you the best possible chance of recovery and is vital if you have occupational asthma. Only if exposure to the allergen stops promptly do you have a good chance of shaking off the asthma. See your doctor as soon as possible and ask for a referral to a chest specialist, so that a definite diagnosis can be made. This is essential if you are going to make a claim for compensation.
Far too many people with occupational asthma are just sent off with an inhaler when they first see their doctor. By delaying the moment when work is identified as the source of the problem, and the exposure to the allergen is stopped, drug treatment can turn occupational asthma into a disabling lifelong problem. Although drugs can be helpful in speeding your recovery once exposure to the allergen
Latex allergy
Sensitisation to latex usually occurs at work (see pp. 133-4), or as a result of having many surgical operations. But latex allergy sometimes occurs in allergy-prone people even though they don’t work in a high-risk job and haven’t had many operations. Some doctors think that if a child with severe allergies needs surgery, this should be done in latex-free conditions, even though the child has no allergy to latex, because of the risk that the operation will sensitise.
Latex can cause either contact dermatitis (see p. 55) or a Type I allergy, whose symptoms can include urticaria, asthma and anaphylaxis. Latex allergy often goes undiagnosed. Once sensitised, you may react to balloons, elastic bands, condoms and household gloves. Latex in the air,
due to powdered latex gloves being used, can be a hazard for someone who is highly sensitive, as can latex traces in food (see box on p. 175). Medical treatment may be problematic (see p. 98 and box on p. 249). Cross-reactions to certain foods can occur (see p. 15 and p. 51).
For those avoiding latex, there are non-latex gloves (see p. 57), and non-latex condoms. Immunotherapy (see pp. 164-9) may be useful in severe cases: it can reduce sensitivity and eliminate cross-reactions to foods.
Other hazards
This article (pp. 132-5) deals mainly with allergens at work, that is, substances which provoke classical allergies (Type I reactions). In addition, there are skin irritants and antigens in workplaces which can provoke contact dermatitis (see p. 56) or contact urticaria (see p.50).
Some of the most dangerous workplace substances are those that bring on asthma but are not allergens. These are usually called low-molecular-weight asthmagens. The most notorious of these are platinum salts, isocyanates (used in cement, in the manufacture of foam, plastics and varnishes, and for spray-painting cars, aeroplanes and boats), colophony (used as a solder in electronics), glutaraldehyde (used in hospitals for sterilisation procedures), and persulphate (used in hairdressing). Powerful respiratory equipment, supplying air from outside the area (see p. 135) is needed if you work with some of these substances, e.g. isocyanates for spray-painting cars.
has ended, they should not be seen as a way of allowing you to go on working with the offending allergen or asthmagen.
If it seems plausible that your allergies or your asthma are related to your work, your doctor should be able to give you a sickness certificate, so that you can have some time away from the workplace, to see if you recover. The medical service at your workplace may be better at diagnosing occupational asthma than your own doctor, but be cautious. In some workplaces they do operate as they should and offer genuinely confidential treatment. But there have also been cases of information being passed to the management, and workers with the early signs of occupational allergies and/or asthma being dismissed on a pretext, or made redundant, to avoid a possible compensation claim. Most occupational health services claim to be independent, but they actually have to earn the trust of the workforce. Before you make any move, ask your colleagues for their views, especially those who have worked there for many years.
Choosing a job
If you have any tendency to allergies, or come from an allergy-prone family, you should be very choosy about where you work. Try to avoid workplaces where there is heavy exposure to allergens, especially airborne allergens which can provoke asthma:
• Bakeries and flour mills, where the allergens concerned may be wheat proteins in the flour, or enzymes added to the flour mix. These allergies can take years to begin.
• Other food-processing works, particularly those dealing with tea, soyabeans, other beans (e.g. gram flour), shellfish and fish (especially if automated gutting machines are used without adequate ventilation). Food preparation and sandwich-making can cause contact urticaria, if there is prolonged contact with a particular foodstuff (e.g. tomatoes).
• Farms, docks and cotton mills – or any other workplace generating dust from plant products. On farms, it is the dust from grain and hay that is often responsible, although mould spores (see p. 121) can also be the culprit. Allergies to mites (found in hay, grain and flour) sometimes occur and eczema is the most common symptom – often called simply ‘grain itch’.
• Saw mills and joineries, because of the wood dust, especially that from hardwoods and from red cedar (Thuja plicata).
• Paper recycling plants, if there is a lot of paper dust in the air.
• Detergent and pharmaceutical factories handling enzymes – these are added to ‘biological’ washing powders and are potential allergens. The risks are less these days, as the enzymes are in granule form rather than powder.
• Factories processing natural products such as psyllium or ispaghula, which are used as laxatives. Anyone who has been sensitised should avoid taking medicines containing the offending substance in the future, because these can sometimes provoke a dangerous anaphylactic reaction.
• Hospitals, clinics and dental surgeries, mainly due to latex rubber, used in gloves and equipment. Although nursing staff and surgeons are most susceptible, other staff including hospital administrative workers can occasionally be affected. Fears about the spread of the HIV virus has led to a huge increase in the use of latex gloves in medicine and dentistry, and a consequent epidemic of latex allergy. The main problem is with powdered latex gloves, which release 15,000 times as much allergen into the air as unpowdered gloves. Unpowdered, low-allergen gloves greatly reduce the risk of latex allergy developing, and non-latex gloves are even better. There are moves to ban the import of powdered latex gloves into Britain. They are already being phased out in hospitals and other medical facilities, but progress is slow in some areas.
• Other workplaces where powdered latex gloves are used, including
Making the workplace safe for everyone
Note that these choices about employment are for the individual employees to make for their own protection - an employer cannot refuse to take anyone on because they have allergies or come from an atopic (allergy-prone) family.
The reasoning behind this is that the workplace should be safe for everyone, as far as possible. As many as one in three of the population may be susceptible to allergies, and it is clearly wrong to bar all such people from major industries. Current thinking, in most countries, is that the focus should be on getting allergens and asthmagens out of the air, not keeping the more vulnerable workers out of the workplace.
hairdressers, dental surgeries, pathology laboratories and police stations. Construction workers wearing rubber gloves are also at risk. Someone who has been sensitised by powdered latex gloves may then react to other items (see box on p.132). Those severely affected can have great problems in daily life and with medical treatment, so anyone with a strong tendency to allergy should strenuously avoid becoming sensitised.
• Factories making or using rubber items may also expose workers to the risk of latex allergy. Anything made by the ‘dipping method’ (e.g. balloons, condoms, elastic bands and gloves) is highly allergenic. Moulded rubber items, such as tyres, are much less of a problem. Neoprene and other synthetic rubber items are not allergenic.
• Chiropody and podiatry clinics, where there is a risk of allergic reactions to the fungus that causes athlete’s foot. It is inhaled on skin flakes from the patients’ feet.
• Laboratories and other workplaces where animals are kept. In the case of mice, rats and other rodents, the allergen is found in the animals’ urine, and becomes airborne as the urine dries. Insects and spiders (e.g, those reared for biological pest control), are also allergenic due to small airborne particles from their bodies. Those working closely with bees (either honeybees or bumblebees, now reared for pollinating glasshouse crops) are liable to be stung frequently, and this can lead to sting allergy (see pp. 60-61).
• Hairdressing salons, where many different items are used that are potentially allergenic, including latex gloves (see above), permanent-wave solutions and henna. The risks of contact dermatitis are also high (see p. 55).
• Greenhouses, where the enclosed conditions can lead to high levels of allergens from plants, moulds and insect pests. There may also be exposure to pesticide sprays or their residues, which can greatly aggravate any underlying tendency to allergies.
If you have ever suffered from atopic eczema, work situations that can bring on contact dermatitis should also be avoided (see p. 55).
Taking a risky job
If circumstances force you to take a job with an allergy risk, observe all the safety procedures that are in place, and where you have the option of turning on extractor fans, wearing protective gear, or simply opening doors and windows, always do so. If the safety procedures seem inadequate, talk to your trade union Safety Representative, or the local Health and Safety Executive which can run a check on safety procedures in your workplace. This will be presented to the employer as a routine check, so they need never know that a member of the workforce has contacted the HSE.
Whatever you do, if you are in a risky job, don’t smoke. At a salmon processing plant in Scotland, 40% of the smokers developed allergies (resulting in asthma) to the fish allergens in the spray from the fish-gutting machine. Non-smokers - who formed the overwhelming majority of the workers - were not affected at all. In United States cotton mills, smokers are affected by levels of cotton dust in the air that are legally defined as ’safe’, while nonsmokers remain unaffected.
Passive smoking at work is also an important issue. A recent US study showed that non-smokers were more likely to develop asthma if they worked alongside a smoker. Your employer has a duty to provide you with clean air. This includes ensuring that other employees do not impose their cigarette smoke on you.
Respiratory equipment
Where respiratory equipment is needed, your employer must provide this, and it must be the right equipment for the job. It should be inspected, tested, cleaned and repaired after each use, and filters should be replaced regularly. All this is your employer’s responsibility, but check that it is being done, and always look the mask over before you put it on.
Two different types of respiratory equipment are currently in use:
• Those that give you a supply of air from outside the work area, either from a compressed-air cylinder, or via an air-hose (airline) supplied with fresh air. In Britain these are called breathing apparatus.
• Those that use the surrounding air but filter it to remove allergens and asthmagens. In Britain these are called respirators. (In some countries this term describes any kind of respiratory equipment.) Ordinary respirators may pose problems for some asthmatics because they cannot breathe in strongly enough to draw sufficient air through the filter. Powered respirators can be the answer: they have a battery-powered unit to help with pulling in the air.
There are government regulations concerning the type of equipment required for each type of allergen and asthmagen. Large companies generally follow these regulations, but small businesses, such as local sawmills, joineries and car-repainting workshops, may not even know about them.
Any respiratory equipment that has a face mask must form a tight seal with your face. Facial hair will prevent this, and so will stubble, so shave carefully. Faces vary enormously in shape, and if your face mask does not fit, ask for a different type of mask or a different type of respiratory equipment. Persist until you get one that’s right for you.
Carry out a ‘fit check’ each and every time you wear the mask. For example, with respirators, you can check the fit by covering the air intake completely with your hand and breathing in sharply: if the mask fits properly, it should collapse onto your face, and remain stuck to your face for several seconds. Look at the manufacturer’s instruction booklet as there may be a specific fit check recommended for the equipment you are using.
If there is any difficulty in breathing through the respiratory equipment, the replaceable filter cartridge or the equipment itself should be replaced. You should also take action immediately if you can smell the substance being handled – but never rely on this as a danger sign, because an extremely small amount, way beyond the detection capacity of the human nose, may be very damaging indeed to your health.
Keep your mask on throughout the work period. If you find this impossible, talk to your employer or
line manager about getting a different kind of respiratory equipment – a powered device, for example, that assists the inflow of air.
No form of respiratory equipment provides complete protection against allergens and asthmagens: there is always the chance of some small amount getting through. This is why respiratory equipment should not be used by those who have already developed occupational asthma but want to stay in their job.
Those who really cannot change jobs (e.g, farmers) are sometimes able to use a powered respirator helmet, which allows them to go on working despite the allergen. But this is not an ideal solution from a purely health point of view. Farmers can also improve matters, where moulds are the source of allergens, by keeping all harvested crops dry and thoroughly ventilated.
A lasting problem
As long as you catch the problem early, and are no longer anywhere near the allergen, your symptoms should disappear completely, but remember that you may still be highly sensitive to the allergen, even years afterwards. For a year or two at least, avoid contact with it again, even in tiny amounts. If someone else in your family works at the same place, they may bring home traces of the allergen on their clothes and hair: ask them to leave their workclothes outside the house and shower on arriving home.
With occupational allergies to airborne food particles, it is possible that the affected individual will later react to the same food when eaten. Experiment very cautiously, especially if the allergen is fish or shellfish.
The allergy may persist long after the job has ended. In one case, doctors found that a woman who had developed ‘baker’s asthma’, while working briefly in a bakery when young, was still allergic to the enzyme additive in bread 20 years later. She suffered an asthma attack whenever she ate bread.

Pollen

Do you ever wake up in the middle of the night with an attack of hayfever or pollen asthma? And do you ever wonder why this should happen? The explanation is that warm air, rising up from ground level on a summer’s day, takes pollen with it high into the Earth’s atmosphere. When the air cools down after sunset, this pollen slowly descends again — an invisible ‘pollen shower’.
This pollen shower falls quite quickly in the countryside, reaching ground level between 8 p.m. and 10 p.m., but hot city pavements and buildings keep upward air currents going, and pollen stays aloft for longer. Most pollen lands on the city between about midnight and 2 a.m. That’s why you wake up sneezing or wheezing – especially if you sleep with the windows open.
Understanding facts like these about pollen can help you to reduce exposure substantially. Pollen is by far the most difficult allergen to avoid, but don’t believe the defeatists who tell you ‘You can’t do anything about pollen.’
Pollen counts and forecasts
Pollen counts are based on the amounts of pollen collected at specific sites earlier in the day, or on the previous day.
Forecasts for the coming day are really just informed guesswork, based on the present pollen count, the time of year, the temperature and rainfall over the last few days, and the weather forecast for the next day. At best, pollen forecasts are only as good as the weather forecast.
Forecasts of pollen can be useful in deciding when to start taking antihistamines for hayfever or when to Increase your asthma preventer drugs (steroid or cromoglycate inhalers). The start of the grass-pollen season is now predicted quite accurately.
Avoiding pollen outdoors
One thing that really can help here is an air-conditioned car. In an ordinary car, closing the windows (and perhaps fitting a filter to the air intake) helps a lot, but the heat is terrible.
The size of the allergen particles
The pollen grains that cause allergies are between 10 and 40 microns in size, with the majority between 20 and 35 microns. An ordinary dust mask takes out particles larger than 5 microns, so it will be adequate for most pollens. However, a few plants — including rye grass — produce tiny allergenic fragments, some no bigger than half a micron. These are about the same size as cat allergen and will therefore need much better masks. For these fragments, it is worth using a HEPA air filter, and getting a high-quality vacuum cleaner.
A cycle mask, or special nose filters sold for hayfever, will keep out pollen at peak pollen times. Just wearing a scarf over the mouth and nose will also give some protection. Another option is to smear a little Vaseline just inside each nostril and breathe through your nose only. Much of the pollen coming into your nose will stick to the Vaseline. If you ’suffer symptoms in the eyes, sun- glasses will keep some pollen out. Even better are wrap-around shades, or safety goggles with side panels sold in DIY stores.
Pollen release occurs at different times of day for different plants. Grasses release pollen from about 7.30 a.m, onwards, but if the ground is damp the release will be delayed until the moisture has evaporated. Unfortunately, a few grass species wait until the afternoon, so there will be some pollen entering the air all day. If you get up at 6 a.m. for a walk or run, you can be safely home by 7.30 a.m. Alternatively, go out In the early evening, after grasses have finished releasing pollen, and before the ‘pollen shower’.
Birch is an afternoon pollen: release peaks between noon and 6 p.m. Unfortunately, there is no information at present for other types of plants.
All types of plants favour warm sunny days for releasing pollen, and they all avoid rainy weather. On cloudy days there is a build-up of pollen in the flowers, so a massive release of pollen occurs on the next day of good weather.
Avoiding pollen indoors
Pollen grains have one huge point in their favour: compared to other allergenic particles, they are big and heavy. This means that they settle more quickly from the air. In a room with 3m- (1 Oft-) high ceilings, all the pollen will settle within four minutes, as long as the air is completely still. In other words, if you close all the doors and windows, block off any draughts, and sit fairly still, within four minutes you will be breathing pollen-free air.
This does not mean that all your symptoms will instantly vanish, because the ‘Late Phase Reaction’ (see p. 13) can go on for up to 24 hours. But you should feel better and, by not starting a new cycle of allergic reaction, you are improving the prospects for the next day. Escaping from pollen for a few hours every day should produce a general improvement in the long run, with your nose and airways becoming less inflamed.
The bad news is that some plants produce allergenic fragments much smaller than the pollen grains themselves. Various grasses do this, as do birch trees and certain plants not generally found in Britain, such as ragweed. These tiny particles take much longer – up to six hours – to settle from the air.
Some plants even produce ‘volatiles’ – airborne chemicals that provoke symptoms. Birch trees release volatiles from their buds in early spring, weeks before the pollen itself is released, and they affect a great many people, including some who are not allergic to birch pollen. Volatiles can only be removed by masks or air filters if they contain an activated carbon filter (see p. 109).
The notorious effects of oil-seed rape on the nose are also due to volatiles, not pollen. These volatiles are simply irritants and there is no allergic reaction.
To cut down on the amount of pollen you inhale at home:
• Dry all your laundry indoors during the pollen season, to stop it collecting pollen.
• Pets bring in pollen on their fur, so keep them outdoors during the pollen season, and avoid stroking them or getting too close. Brushing them thoroughly before they come in is another option, but the allergic individual should not do this.
• Close the windows when your offending pollen is being released, and during the evening ‘pollen shower’ (see p. 126).
• Change your clothes when you arrive home, since they will be coated with pollen, and wash or rinse your hair. Keep some clothes for indoor use only.
• Aim for still air (no draughts, no fans and no vigorous movement) in the rooms where the allergic individual studies, sits or sleeps. Air currents stir up pollen from the floor and furnishings. (No draughts means poor ventilation, of course, which is acceptable during the pollen season – but ventilate again afterwards, to discourage moulds and dust mites.)
• If tranquil air is an impossibility, consider getting a high quality air cleaner, or air conditioning. Alternatively, wet-dust and vacuum every day (using a vacuum cleaner that keeps allergen particles in – see pp. 116-17) to reduce the amount of pollen residue. Those who are very sensitive may need to do this as well as having an air cleaner.
• Cover your armchair and bed with a dust sheet during the day. In the evening, fold this up very gently and wash it. This removes the layer of pollen that accumulates on furniture during the day, before it is disturbed and inhaled. If you are studying, cover your desk and books when not working.
Places to go, places to avoid
• For the grass-sensitive, mown grass is usually fine (it won’t flower) although some people react to skin contact with grass (see p. 43). Unmown grass does flower, and will cause symptoms. Wheat, barley and oats, although they are grasses, release little pollen and rarely cause problems. Rye and sugarcane do release pollen, and may affect some people, but maize (corn) has heavy pollen that does not travel far, so it rarely causes much trouble.
• The levels of most pollens do not differ much between town and country. In fact, high up in a tower-block may be one of the worst places, because of pollen rising on warm air.
• The seaside is often pollen-free thanks to onshore breezes. Mountain peaks and ridges are also good, but deep mountain valleys can be pollen traps.
Roses are not the problem
The pollens that cause allergic reactions almost all come from plants with inconspicuous greenish flowers. These plants are pollinated by the wind, which is why there is so much of their pollen wafting about in the air. Colourful and scented flowers are pollinated by insects and have big sticky pollen grains that don’t float about and rarely cause allergies. However, strong scents can irritate the nose of those who already have hayfever, and make their symptoms worse.

Candidal Spores of the Fungus, Candida Albicans.
`As a small child Jason was plagued with ear infections which led to many courses of antibiotics,’ Hannah Mitchell recalls. ‘Eventually he started to get symptoms such as an upset stomach, itchy bottom, flu-like symptoms and extremely itchy eyes. The GP prescribed eye drops and when I put them in Jason screamed his head off. In the morning every single eyelash had fallen out. Jason’s health deteriorated and a few months later his eyebrows started to itch. Within two days every single eyebrow hair had fallen out. His eyes were worse and I was offered steroid eye drops again. Reluctantly I accepted.’
‘Putting the drops in caused Jason extreme pain. The red patches of skin around his eyes spread and the itching increased. I was at the end of my tether when I came across a book in the library about food-related illness…
What Hannah discovered from her reading was that, for many with diarrhoea, bloating, wind and an itchy bottom, the cause can be an overgrowth of yeasts in the gut, caused in part by repeated courses of antibiotics which kill off friendly gut bacteria in the gut flora (see p. 204) and allow yeasts to flourish. This is not mainstream medicine, which is why none of the doctors who had seen Jason mentioned the possibility of yeast overgrowth.
Yeasts are microscopic fungi, so anti-fungal drugs are needed to kill them. However, reducing the intake of sugar in the diet is also very effective because yeasts living in the gut thrive on sugar. Hannah took matters into her own hands, and tried out a diet containing no sugar and no yeast. (The reason for avoiding yeast in food is discussed below.) There was some improvement and, encouraged, she went back to the doctor and asked for anti-fungal drugs.
The doctor agreed, and to Hannah’s immense relief, the combination of diet and drug treatment worked for Jason – it cleared the diarrhoea, wind and itching, and eventually allowed his eyelashes and eyebrows to grow back. (Note that few other patients with yeast problems suffer hair-loss – this is a very exotic symptom – but yeast overgrowth can produce some other quite unusual reactions.)
The elusive culprit
So far, you will notice, I have not mentioned Candida. Among those doctors who study and treat this condition, this particular yeast was once considered the prime suspect. Indeed, the disease itself was called ‘candidiasis’. But the role of Candida is now considered doubtful by many.
Researchers such as Dr John Hunter, of Addenbrooke’s Hospital in Cambridge, have tried to find Candida in their patients without success. ‘I think now we have to reject the idea of Candida causing the symptoms,’ says Dr Hunter. ‘But I do believe that there is an imbalance in the gut flora – the micro-organisms that live in the gut. I believe that’s at the root of so-called “candidiasis”.’ This new evidence has not yet affected beliefs about candidiasis’ and ‘Candida’ in the complementary health field.
The fact remains that anti-fungal drugs have proved very helpful to many patients with the typical cluster of symptoms –diarrhoea, wind, bloating and an itchy anus – that were previously attributed to Candida. Given the effectiveness of these drugs, it seems probable that yeasts of some kind are playing a large part in this condition. So the term ‘yeast overgrowth’ is being used, rather tentatively at the moment, as a label for this condition. The yeasts concerned have not, as yet, been identified.
The facts about Candida
This box is about Candida as understood by conventional medicine, rather than ‘Candida’ and ‘candidiasis’ as understood by alternative medicine.
The yeast known as Candida lives naturally in the gut, usually causing no trouble. Problems are usually caused by Candida only when it sets up home in the throat, vagina or penis (’thrush’ infections). Such localised infections have well-defined symptoms and, in most cases, are easily treated with anti-fungal drugs. Patients with damaged immune systems, caused by anti-cancer drugs or AIDS, often develop more widespread Candida infections, but this never happens to people with a normal immune system.
Inhaling steroids and not rinsing out the mouth afterwards can make asthma sufferers more susceptible to Candida infections in the throat (see p. 145).
Other symptoms that have been linked to yeast overgrowth are:
• fatigue
• poor concentration
• irritability, depression and confusion
• headache or migraine
• severe premenstrual problems
• recurrent cystitis
• skin rashes
• aching muscles
• chronic urticaria.
Sometimes there is constipation rather than diarrhoea. Recurrent thrush – a genuine Candida infection in the vagina – can also be a feature of this problem. Occasionally allergic symptoms such as asthma seem to get worse with yeast overgrowth.
Is there an allergic reaction to the yeast?
Those with symptoms typical of yeast overgrowth may give a positive skin-prick test to Candida, but what this means is debatable. For one thing, not everyone with this condition gives a positive test. For another, some entirely healthy people give a positive skin-prick test to Candida. To complicate matters, there are a lot of cross-reactions (see p. 14) between different kinds of yeasts and moulds, due to similarities in their chemical constituents. So the positive skin-prick test does not mean that Candida itself triggered the original IgE-response.
The question of whether some kind of sensitivity reaction to yeasts is occurring in those with yeast overgrowth, and contributing to their symptoms, is an interesting one. The benefits from avoiding yeast in food (see Diagnosis and treatment) suggest that it may be – but this is a question that cannot be answered at present.
Diagnosis and treatment
Unfortunately, this is one of those ’suck-it-and-see’ conditions, where diagnosis and treatment are the same – you try the treatment for yeast overgrowth, and if it works you assume that the disease is, or was, yeast overgrowth. This is far from satisfactory, but is the best that can be done at present.
It is only worth trying this treatment if you have quite a number of the symptoms listed. Bowel problems and an itchy anus are characteristic, and if you have neither of these it is unlikely the treatment will help you.
A key part of the treatment is a no-yeast-no-sugar diet (see p. 205). This diet has been developed on a largely pragmatic basis, and seems to work – but why? The rationale for cutting out sugar is clear – it feeds yeasts in the gut. But why avoiding foods containing yeast should help is uncertain. Possibly the yeasty food supplies some special nutrient that benefits the yeasts living in the gut. Alternatively, there might, for some people, be a sensitivity reaction to the yeast in food (see left).
If it seems that you are on the right track, because there is some improvement with this diet, ask your doctor for anti-fungal drugs. You should take these in addition to the diet. Nystatin (see box below) is very safe for most people, since it is not absorbed from the gut. Bacterial replacers (see p. 205) may also be useful.
You may need a referral to a doctor who is knowledgeable about yeast overgrowth but try to avoid those doctors and alternative therapists who are part of the ‘Candida’ craze, and think that ‘candidiasis’ explains a huge variety of illnesses. You may not have yeast overgrowth at all, so you need someone with an open mind.
Eczema and yeasts?
Doctors have found that some children whose eczema looks very red, and is not responding to treatment, have IgE in the blood against a range of yeasts and other fungi (Candida, Trichophyton, Saccharomyces and Pityrosporum). Given the tendency to cross-reactions among fungi (see main text) it is not clear exactly what these reactions indicate. A proportion of these children get much better on anti-fungal drugs, including a drug called nystatin, which is not absorbed through the gut wall – so cannot reach the skin. The eczema improves, and at the same time there is a fall in levels of anti-fungal IgE in the blood. In other words, a treatment that can only affect fungi living in the gut benefits the skin. Exactly what is going on here is unknown, but the important point is that the treatment seems to work. This is a controversial topic, but since nystatin is an extremely safe drug, your doctor may be prepared to try it out. A course of 3-4 weeks is the minimum needed.

A blocked or runny nose in Allergy
THAT LASTS ALL YEAR
`Everyone has heard of hayfever, but it’s news to most people that you can have this sort of problem all year round,’ complains Elizabeth. ‘Before we got the treatment sorted out, Benny was “the kid with the constant cold”, and I did notice other mothers looking less than enchanted at the prospect of his coming over to play.’
Benny suffers from allergic reactions to house-dust mites and cats which cause hayfever-style symptoms (26) all year round. This condition doesn’t even have a common name – the medical one is perennial allergic rhinitis – yet it is one of the most common allergic diseases.
Any airborne allergen that is found in the air all year round can cause perennial allergic rhinitis:
• House-dust mite is the number one suspect in most parts of the world. Particles from other insects, such as midges and mosquitoes outdoors, and cockroaches, house flies, bloodworms (used for fish food) or carpet beetles indoors, can also cause nasal allergies.
• Mould spores can be the problem: they are found both indoors and out.
• In some regions, certain types of pollen are airborne all year round (27).
• All pets other than fish produce allergenic particles (even snakes).
• Allergens encountered at work (133) can also produce symptoms in the nose. This is a warning sign gn you should not ignore – it often means that occupational asthma is on its way (132).
Occasionally, the offending substance is being eaten not inhaled. This is less common, so you should investigate inhaled allergens first, before trying an elimination diet (29).
Skin-prick tests (91) will help to identify any airborne allergens that are responsible, but where food is the culprit, skin-prick tests are often negative (69)
Triad and NARES
Diagnosis of perennial allergic rhinitis is complicated by the fact that there are two other conditions – called triad and NARES – which produce similar symptoms and involve the immune system but are not, strictly speaking, allergies.
Triad is so called because it involves three distinct symptoms:
• perennial rhinitis
• polyps in the nose – little fleshy growths that can kill your sense of smell
• asthma.
People with triad tend to collect all three symptoms gradually, in no fixed order, over a period of years or even decades. Many are sensitive to aspirin and related drugs, and almost everyone with triad develops this sensitivity eventually.
Aspirin sensitivity can come on very suddenly and produces a reaction akin to anaphylaxis (101). This can be fatal, so it is probably best to avoid all aspirin-like drugs if you have triad, even though you have not reacted to aspirin in the past Aspirin-like drugs are found in painkillers, arthritis drugs and cold remedies – check with a pharmacist before you buy (151).
If you have asthma, think twice about operations on the nose to remove polyps – they can make the asthma much worse.
The initial letters of Non-Allergic Rhinitis with Eosinophilia have been stretched a bit to get NARES. (This is a medical joke –the Latin word Hares means nostrils.) The problem is caused by eosinophils (19), which flock into the nose and cause severe inflammation. Some people with NARES go on to develop triad.
Collateral damage
Having the nose swamped with mucus can lead to knock-on problems in the ears, sinuses and airways.
If the tube that leads from the ear to the nose (the Eustachian tube) becomes blocked, then fluid cannot drain away from the middle ear. This is called secretory otitis media, or glue ear - it dulls the hearing and causes an unpleasant ‘popping’ sensation. The ears may also feel blocked and itchy, but if children have had this problem since they were tiny they may not complain because they assume that’s just the way ears are supposed to feel. Deafness is often the first sign anyone notices.
Sinusitis is another possible complication, because fluid from the sinuses should also drain into the nasal cavity. With the ouflow blocked, mucus builds up in the sinuses and can become infected by bacteria (30).
Post-nasal drip can also occur with perennial allergic rhinitis. The over-abundant mucus runs down the back of the nose, into the throat and then the airways. This produces a persistent phlegmy cough, which may occasionally be mistaken for asthma.
When the rhinitis is treated effectively, all these problems should sort themselves out, although additional treatment is usually necessary in the case of persistent sinusitis (33).
Treatment
Where an allergen such as house-dust mite or mould spores has been identified as the source of the problem, eradicating it from your house (see Chapter 4) will make a huge difference, and may avoid the need for drugs. If the allergen is unavoidable, immunotherapy (see pp. 164-8) or some alternative form of desensitisation (see pp. 210-13) could be very helpful.
Where drugs are needed, nose drops are best. They get the drugs right to the target so doses are minimal, which means very few side effects. The drugs used are:
• cromoglycate to prevent the allergic reaction before it starts (148)
• antihistamines to block the allergic reaction before it produces inflammation (138)
• steroids to calm down inflammation (144). Steroid nose drops are also useful for NARES and triad. If you are taking steroid drops continuously, your doctor should check the membranes inside your nose every six months. Make sure you put the drops in correctly, especially if you have polyps (144).
If you suffer stinging, burning or dryness, it might be due to preservatives in the drops, not the drug itself (see box on p. 33), so talk to your doctor about a different formulation.
Don’t use over-the-counter decongestant drops: they do nothing to treat the allergy or inflammation, and are little more than a ‘chemical crowbar’ to open up the nose. Your nose gets addicted to them in a few days, and when you stop using them you get ‘rebound congestion’ - absolute and total blockage. It does wear off eventually, but is unpleasant meanwhile. If you are suffering this problem at this very moment, don’t put more decongestant drops in - your nose needs to go ‘cold turkey’ to recover, not have its addiction fed!
If none of the anti-allergy drugs work, but decongestant drops do, then you probably have a non-allergic disease called vasomotor rhinitis. The symptoms are very similar to allergic rhinitis, but without the sneezing and itching. See your doctor again, because there is an effective treatment that uses anticholinergic drugs (see box on p. 156). Acupuncture (see below) can also be helpful.
An elimination diet (194) will diagnose any food reactions. It works wonders for some people with severe and unexplained perennial rhinitis, Including people with such a flood of mucus that they can scarcely work or live normally. You should certainly give this diagnostic diet a try if there are clues that suggest food is the culprit (69) or if no airborne allergen can be identified. Yeast - found in bread, beer and B-vitamin tablets -is quite often the culprit in rhinitis, but it could be any food.
Acupuncture is worth trying, to reduce the blockage in the nose and stem the flow of mucus, because the autonomic nervous system (see box on p. 235) plays some part in the symptoms of allergic rhinitis (and is the sole cause of the symptoms for those with vasomotor rhinitis). For those with severe sinusitis, osteopathy can be good for draining mucus from the sinuses.
Very occasionally, psychological or emotional reactions play a part in perennial allergic rhinitis, with symptoms getting significantly worse during stressful events. One possible manifestation of this is post-coital rhinitis, where sex brings on rhinitis (and sometimes asthma as well). In such cases, psychotherapy should be considered. (But check you are not just allergic to the dust mites in your bed first…)
A nose by any other name…
Rhinitis means inflammation (-itis) of the nose (rhin-). The same Greek word gives us rhinoceros - ‘nose-horn’.