Suspected polymyxin B-induced pemphigus vulgaris in a dog

J Rybnicek, PB Hill

Research output: Contribution to journalArticle (Academic Journal)peer-review

7 Citations (Scopus)


A case of pemphigus vulgaris (PV), putatively induced by topical application of polymyxin B ear drops, is described. A 3-year-old, female Tosa Inu, presented with acute onset swelling, blistering and ulceration of the pinnae, nostrils, lips and oral mucous membranes. The dog was depressed, febrile and anorexic. For 7 days prior to the onset of the acute ulcerative disease, polymyxin B ear drops had been applied to both ears to treat an ear infection. Skin and mucosal biopsies showed suprabasilar cleft formation and acantholysis, indicative of PV. The polymyxin B ear drops were discontinued and the dog was treated with intravenous fluids, systemic and topical antibacterial therapy, and immunosuppressive therapy comprising prednisone and azathioprine. Complete remission was noted after 2 weeks, and the immunosuppressive therapy was discontinued one month later. No clinical signs of PV recurred over a 1 year follow-up period. As PV does not usually resolve spontaneously, or enter long-term remission, it was considered that the condition was most likely drug induced due to the aural application of polymyxin B.
Translated title of the contributionSuspected polymyxin B-induced pemphigus vulgaris in a dog
Original languageEnglish
Pages (from-to)165 - 170
Number of pages6
JournalVeterinary Dermatology
Volume18 (3)
Publication statusPublished - Jun 2007

Bibliographical note

Publisher: Blackwell Synergy
Other identifier: 13653164


Dive into the research topics of 'Suspected polymyxin B-induced pemphigus vulgaris in a dog'. Together they form a unique fingerprint.

Cite this