Journal
BRITISH JOURNAL OF DERMATOLOGY
Volume 147, Issue 6, Pages 1166-1170Publisher
BLACKWELL PUBLISHING LTD
DOI: 10.1046/j.1365-2133.2002.05021.x
Keywords
amoxicillin; drug allergy; infectious mononucleosis; lymphocyte transformation test; patch test
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Background Teenagers and young adults frequently develop maculopapular exanthema following amoxicillin intake within infectious mononucleosis. The underlying pathomechanisms are still largely unknown. Objectives To investigate whether amoxicillin-induced exanthema in florid infectious mononucleosis is a disease-associated phenomenon or results from specific sensitization to the drug. Methods Four patients with amoxicillin-induced exanthema within infectious mononucleosis were analysed in vivo by prick, intradermal and patch tests and in vitro by means of the lymphocyte transformation test (LTT) employing amoxicillin, ampicillin, benzylpenicillin and phenoxymethylpenicillin. Results Drug-specific sensitization to amoxicillin in the LTT was observed in three patients, two of whom showed a side-chain-specific sensitization to amoxicillin and ampicillin. The in vitro results were confirmed in vivo by skin tests. Conclusions These data suggest that real sensitization to amoxicillin and ampicillin may occur within infectious mononucleosis and may be detected in vivo and in vitro by means of skin tests and the LTT.
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