Allergy testing - Prick testing for Type I
Allergy
What is Type I allergy?
This is where the body reacts abnormally to substances naturally
present in our environment such as pollen, dust, pets, latex and
foods including nuts. Allergy is on the increase in Western
European countries. Patients with asthma, eczema, allergic
conjunctivitis and hay fever are more commonly affected. Reactions
often occur very quickly on exposure to the allergen, eg itchy eyes
and wheezing within a few minutes of exposure to cats.
What does Type I allergy testing involve?
First a detailed and prolonged history is taken with questioning
about the exact nature and severity of the symptoms being
experienced. Allergy testing, if appropriate, is carried out by
pricking microscopic amounts of liquid allergens through the skin
(usually on the forearm) and checking some minutes later to see
whether the skin has reacted to the substance (eg latex). If any
foods are suspected to be causing reactions, they should be brought
to the consultation, separately wrapped and labelled, and these can
also be tested.
When will I be able to go home after
testing?
The itchy reactions on the test site usually last approximately
half an hour but you will be able to go home before they
disappear.
What risks should I know about?
Prick testing is extremely safe. It is exceptionally rare to
experience any serious reaction. Occasionally patients with
severe pollen allergy may experience a temporary runny nose or
itchy eyes during testing. Questioning before testing is intended
to identify any rare patients more at risk of undergoing a more
severe reaction eg wheezing. Occasionally prick testing will be
thought potentially hazardous and a blood test may be suggested
instead. Full resuscitation equipment is available at CircleBath.
It is recommended that patients bring to their consultation any
inhalers, antihistamine tablets and adrenaline autoinjector devices
such as Epipen.
Circle Care
Prick testing is carried out at CircleBath, our state of the art
hospital, which provides you with the best facilities for patient
care. Dr Buckley personally carries out the testing and gives
individualised advice during the consultation, depending on
results.