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Allergies and hypersensitivities

People have immune systems that recognize what is usually part of the body (blood, cells, hair etc.) and what is not (bacteria, viruses, splinters etc.). Sometimes the immune system becomes hypersensitive to chemicals from foods (peanuts, shellfish, nuts, eggs, wheat); animals (dogs, cats); and other materials (grasses, dust, dustmites, medicines).

This causes allergic reactions. For most people, the allergic reaction is hay fever (runny nose and itchy eyes) or hives (a bumpy skin rash). In some people this reaction is severe and causes anaphylaxis, which is an emergency needing immediate injection with adrenaline from an epi-pen.

The Australasian Society of Clinical Immunology and Allergy (ASCIA) recommends that for a severe allergic reaction adrenaline is the initial treatment. For further information, visit the Choosing Wisely Australia website.

Allergies can be treated with antihistamine medicines, and allergy tests might find the cause of the hypersensitivity. If so, it may be possible to have regular injections to stop the body overreacting.

ASCIA also recommends that you should speak to your doctor or specialist about the benefits and safety of allergen immunotherapy or before attempting any allergy testing or treatment. For further information, visit the Choosing Wisely Australia website.

Follow the links below to find trusted information about allergies and hypersensitivities.

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Found 904 results

Food Allergy | myVMC

Food allergy refers to a specific allergic reaction, known as a type 1 hypersensitivity reaction, to a specific food (or foods), which is mediated by proteins known as IgE

Read more on myVMC – Virtual Medical Centre website

Hypersensitivity reaction - Type III | myVMC

Hypersensitivity means that the body responds to a particular substance (called allergens) in an exaggerated fashion, where it does not happen in normal circumstances

Read more on myVMC – Virtual Medical Centre website

Hypersensitivity reaction - Type II | myVMC

Hypersensitivity means that the body responds to a particular substance (called allergens) in an exaggerated fashion, where it does not happen in normal circumstances

Read more on myVMC – Virtual Medical Centre website

Hypersensitivity reaction - Type I | myVMC

Hypersensitivity means that the body responds to a particular substance (called allergens) in an exaggerated fashion, where it does not happen in normal circumstances

Read more on myVMC – Virtual Medical Centre website

Hypersensitivity Reaction Type IV | myVMC

Type IV hypersensitivity reactions such as contact dermatitis are allergic reactions which occur due to overactivity of immune cells called T lymphocytes.

Read more on myVMC – Virtual Medical Centre website

Non-food allergies in children | Raising Children Network

If your child has allergies to dust mites, pollen, grass, animals, latex, insect stings and bites, read this guide for reliable allergy management advice.

Read more on Raising Children Network website

Immunology & allergy tests & treatments: 5 recommendations from Australasian Society of Clinical Immunology & Allergy (ASCIA)

Recommendations from the Australasian Society of Clinical Immunology & Allergy on infant feeding, anaphylaxis, allergy testing, immunotherapy & food allergy.

Read more on Choosing Wisely Australia website

Food allergies (food intolerance) information video | myVMC

Food allergies and insensitivities like peanut allergy, milk allergy and gluten intolerance can cause rash, other allergy symptoms or anaphylaxis.

Read more on myVMC – Virtual Medical Centre website

Extrinsic allergic alveolitis (EAA) or hypersensitivity pneumonitis (HP) | myVMC

Hypersensitivity pneumonitis or extrinsic allergic alveolitis is a widespread disease of the lungs, involving inflammation in both the small airways of the lung and the alveoli (air sacs)

Read more on myVMC – Virtual Medical Centre website

Peanut allergy | myVMC

Food allergies, including allergy to peanuts and other nuts, can have effects at several different sites in the body, including the mouth, throat, lungs, skin and gastrointestinal tract

Read more on myVMC – Virtual Medical Centre website

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