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Increase in the Rate of Food Allergy

Theres an urgent need for epidemiological studies to evaluate the recent increase in the rate of food allergy in Australia and its significant impact on the nations health resources .

Associate Professor Raymond Mullins, a Canberra-based clinical immunology and allergy physician, said his practice has seen a 12-fold increase in demand for food allergy-related consultations with children aged under five over the 12 years to 2006.

Theres been a seven-fold increase in consultations related to food-associated anaphylaxis over that time, and a dramatic increase in hospital admissions for anaphylaxis throughout Australia, particularly in young infants Assoc Prof Mullins said.

While anxiety has probably contributed to service demand, the underlying prevalence of food allergy has also increased in Australian infants over the past decade, Assoc Prof Mullins said.

American and UK studies have also shown a 2-3 fold increase in peanut allergy in young children. So when parents and grandparents say that they never saw it in their day, theyre probably right said Prof Mullins. Its important for people to realise that were not talking about tired or hyperactive kids, or a child with a snotty nose. Thats not allergy.

Were talking about proven allergic reactions soon after food, such as severe facial swelling and rashes, vomiting and in some cases, potentially dangerous difficulty breathing or collapse (anaphylaxis). Even when a reaction isnt dangerous, its often frightening for those involved.

There is an urgent need for coordinated systematic studies of the epidemiology of food allergy in Australia and abroad, to ascertain risk factors and guide public health policy.There are important implications for public health, medical workforce planning, costs of care and the availability of public allergy services.

Theories that may explain the increase in allergies include greater exposure to pote ntially allergenic foods, sensitivity to topical allergens, increased use of antacids for infants, sensitisation through breast milk, prolonged breastfeeding, and increasing maternal age.

Assoc Prof Mullins said that there are a number of long-term implications if widespread studies confirm there has actually been a big increase in the prevalence of food allergies.

[They include] a need for more resources for evaluating and re-evaluating patients; an eventual increase in the incidence of food allergy in older people and, possibly, a need to reassess the risk of fatal outcomes in young children, he said. One day we hope to be able to say that we have a way of desensitising to food, like we already can with hay fever and venom allergies.


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