Figure 3.

Outcomes of allergy testing in 111 patients with a history of allergy to cephalosporin antibiotics.^†Among 111 patients who were studied for a history of allergy to cephalosporin antibiotics, some of them had multiple reactions and were included in more than one group. ^‡2 patients had negative direct drug challenge without prior skin testing (2 direct for a suspicion of an immediate-type reaction). Direct drug challenges were performed on the basis of the physician's assessment because the risk of a reaction was highly unlikely. SJS, Stevens-Johnson syndrome.