title: Allergy diagnostic testing in clindamycin-induced skin reactions.
abstract: BACKGROUND
  In clinical practice, clindamycin is increasingly used because of its good tolerability and high efficacy with excellent tissue penetration. However, with increased application of clindamycin, the frequency of side effects such as skin eruptions rises and the need for diagnostic testing to identify clindamycin allergy increases. The aim of this retrospective analysis was to demonstrate the results of skin and challenge tests in cases of clinically suspected clindamycin allergy.
  
  
  METHODS
  We evaluated 33 patients with a history of a skin reaction in temporal relation to treatment with clindamycin using standardized patch and prick skin testing. In the case of negative skin tests, oral challenges were performed.
  
  
  RESULTS
  Clindamycin hypersensitivity was excluded in 20 patients by negative skin tests and subsequently tolerated oral challenge tests. In 5 patients, positive skin tests strongly suggested delayed-type non-IgE-mediated allergic clindamycin hypersensitivity. In 6 skin test-negative patients (2 patients refused challenge tests), a rash was provoked by controlled challenge tests.
  
  
  CONCLUSIONS
  The evaluation of patients with clindamycin-associated skin reactions should include appropriate allergologic tests establishing or excluding the diagnosis of clindamycin hypersensitivity. Combined testing, i.e. skin tests and subsequent challenge tests, appears to be necessary to definitely confirm or rule out the presence of allergic clindamycin hypersensitivity.
authors.affiliation: Department of Dermatology, Venereology and Allergology, University of Würzburg, Würzburg, Germany.
authors.forename: Cornelia S
authors.initials: CS
authors.lastname: Seitz
authors.forename: Eva-B
authors.initials: EB
authors.lastname: Bröcker
authors.forename: Axel
authors.initials: A
authors.lastname: Trautmann
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000900:Anti-Bacterial Agents / Q000009:adverse effects* / Q000276:immunology / Q000627:therapeutic use; D002648:Child; D002981:Clindamycin / Q000009:adverse effects* / Q000276:immunology / Q000627:therapeutic use; D004342:Drug Hypersensitivity / Q000175:diagnosis* / Q000276:immunology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012882:Skin Tests; D055815:Young Adult
chemical_list: D000900:Anti-Bacterial Agents; D002981:Clindamycin