During an allergy test, what should be the characteristic of the allergens used in the scratch test?

The allergens used in a scratch test should be in small amounts to ensure safety and prevent excessive reactions during the test. This method, which involves creating a small scratch on the skin and placing a tiny amount of the allergen on or in the scratch, requires careful handling to minimize discomfort and potential adverse reactions. Using small amounts allows for the assessment of sensitivity without overwhelming the immune system, providing accurate results.

While applying allergens under pressure, diluting them with water, or using oil-based substances could alter the test's efficacy or accuracy, the requirement for small amounts is essential to control potential allergic responses and ensure a clear reading of the results. This cautious approach helps healthcare providers interpret the reactions more effectively and determine the patient's sensitivities reliably.