What is the correct spacing between allergens for a scratch allergy test?

The correct spacing between allergens for a scratch allergy test is typically 1 1/2 to 2 inches. This spacing allows each allergen to be tested without risk of overlapping reactions, which could complicate the interpretation of results. Proper spacing ensures that any reactions, such as redness or swelling, are clearly associated with a specific allergen, providing accurate data for the healthcare provider to evaluate potential allergies. This careful arrangement is essential for the efficacy of the test, so clinicians can make appropriate recommendations and develop treatment plans based on the findings.