Atypical dermatophilus congolensis infection in a three-year-old pony

Barbara A Byrne, Courtney L. Rand, Valerie R. McElliott, Eileen M. Samitz, Stephanie A. Brault

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Dermatophilosis caused by Dermatophilus congolensis causes exudative dermatitis in a variety of species. The infection is generally limited to the cutaneous tissues, where infection is acquired from the environment and bacteria penetrate into keratinized epithelium through epithelial disruption. A 3-year-old pony filly was examined for enlarging mandibular lymph nodes during the preceding 10 months. Biopsy of the node revealed mixed and granulomatous inflammation and thick, filamentous Gram-positive bacteria. Dermatophilus congolensis, confirmed by biochemical testing and sequencing of the ribosomal RNA gene, was cultured from a sample aspirated from the infected site. Dermatophilus congolensis should be considered as a possible etiologic agent associated with lymphadenopathy and granulomatous inflammation in the horse.

Original languageEnglish (US)
Pages (from-to)141-143
Number of pages3
JournalJournal of Veterinary Diagnostic Investigation
Issue number1
StatePublished - Jan 1 2010


  • Dermatophilosis
  • Dermatophilus congolensis
  • Horses
  • Lymphadenopathy

ASJC Scopus subject areas

  • veterinary(all)


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