Premium
Streptomyces cyaneus dermatitis in a dog
Author(s) -
Nicholls PK,
Allen G,
Irwin PJ
Publication year - 2014
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/avj.12135
Subject(s) - biology , streptomyces , axilla , isolation (microbiology) , microbiology and biotechnology , antibiotics , biopsy , ribosomal rna , dermatology , pathology , gene , medicine , bacteria , genetics , cancer , breast cancer
Background A nearly 4‐year‐old neutered male A ustralian T errier was referred for a nodular pyogranulomatous mass of the right axilla. It had been poorly responsive to antibiotic therapy. Case report Based on filamentous G ram‐positive organisms identified in earlier biopsy material, infection by an A ctinomyces sp. was suspected and the dog showed clinical improvement on a trial of potentiated sulfonamides. Recurrence 5 months later prompted euthanasia, with Streptomyces cyaneus being cultured and confirmed by genetic sequencing of part of the 16 s ribosomal RNA gene. Conclusion Invasive Streptomyces spp. infections are uncommon in humans and animals, and isolations are sometimes considered to be contaminants, but the demonstration of the organism within the lesion in this instance indicates that the isolation of a Streptomyces sp. from veterinary cases should not always be considered as contamination, because this genus is clearly pathogenic.