The intradermal skin test conducted on a patient is positive. What did the nurse most likely assess in this patient?
1. a wheal larger than 5 cm from the control and erythema
2. localized, itchy wheal
3. papules
4. ulceration
Correct Answer: 1
The appearance of a wheal and erythema, with a wheal diameter at least 5 mm larger than that produced by the control, indicates a positive response in an intradermal skin test. A localized itchy wheal would be a positive response for a prick test. Papules and ulceration would be a positive response for a patch test.
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