In Vivo Diagnostic Tests

Skin Prick Tests

ALK-Abello Skin Prick Tests

The identification of the allergens actually causing the symptoms of allergy conditions (such as hay fever/rhinitis, asthma, conjunctivitis, gastro-intestinal disturbance, etc.) is an important pre-requisite step in order to try to avoid those allergens, and so lessen the immunological stimulation underlying those symptoms.

In addition, it is absolutely essential that a proper and reliable identification of the problem allergens be performed prior to any treatment with an appropriate Immunotherapy Vaccine.

The allergens that are most usually implicated in this Type I IgE-mediated allergy are:

• Inhalant allergens such as Grass / Weed / Tree Pollens, Mould Spores, House Dust Mites, Cat & Dog & Horse Epithelia
• Injectant allergens such as Bee Venom and Drugs
• Occupational allergens such as Latex
• Ingestant allergens such as various Foods.

The Doctor can often presumptively identify the problem allergens from a careful clinical history and examination. However confirmation of the identity of the problem allergens is most usually required. This can be achieved by either in vivo Skin Prick Tests or in vitro Blood Tests to measure allergen-specific IgE.

Skin Prick Tests are most usually utilised in New Zealand as the method of choice, as they are fast, inexpensive and reasonably clinically reliable. However there are several factors that must be considered, such as range of allergens available, patient's ongoing medication, potentially dangerous allergens, highly sensitised patients, operator variability, etc. For these reasons, the in vitro blood tests may be used preferentially in some circumstances, or may be used together with Skin Prick Tests.

Skin Prick Tests are performed by trained health care professionals in Allergy Clinics, some Doctors Rooms and some Laboratories.

Last updated 30th December 2009.