Rhodococcus equi Infections in Goats: Characterization of Virulence Plasmids. Issue 2 (March 2018)

• Record Type: Journal Article
• Authors: Stranahan, Lauren W.; Plumlee, Quinci D.; Lawhon, Sara D.; Cohen, Noah D.; Bryan, Laura K.
• Is Part Of: Veterinary pathology. Volume 55:Issue 2(2018)
• Page Start: 273
• Page End: 276
• Publication Date: 2018-03
• Subjects: caseous lymphadenitis -- goat -- Rhodococcus equi -- virulence plasmids -- virulence-associated protein N; Veterinary pathology -- Periodicals; Pathology, Veterinary -- Periodicals; 636.089607
• DOI: 10.1177/0300985817747327
• Languages: English
• ISSNs: 0300-9858

Abstract

Rhodococcus equi is an uncommon cause of systemic pyogranulomatous infections in goats with macroscopic similarities to caseous lymphadenitis caused by Corynebacterium pseudotuberculosis . Caprine cases have previously been reported to be caused by avirulent R. equi strains. Six cases of R. equi infection in goats yielding 8 R. equi isolates were identified from 2000 to 2017. Lesions varied from bronchopneumonia, vertebral and humeral osteomyelitis, and subcutaneous abscesses, to disseminated infection involving the lungs, lymph nodes, and multiple visceral organs. Isolates of R. equi from infected goats were analyzed by polymerase chain reaction for R. equi virulence-associated plasmid ( vap ) genes. Seven of 8 isolates carried the VapN plasmid, originally characterized in bovine isolates, while 1 isolate lacked virulence plasmids and was classified as avirulent. The VapN plasmid has not been described in isolates cultured from goats.