Emerging Infectious Diseases (Feb 2013)

Macrolide- and Rifampin-Resistant Rhodococcus equi on a Horse Breeding Farm, Kentucky, USA

  • Alexandra J. Burton,
  • Steeve Giguère,
  • Tracy L. Sturgill,
  • Londa J. Berghaus,
  • Nathan M. Slovis,
  • Jeremy L. Whitman,
  • Court Levering,
  • Kyle R. Kuskie,
  • Noah D. Cohen

DOI
https://doi.org/10.3201/eid1902.121210
Journal volume & issue
Vol. 19, no. 2
pp. 282 – 285

Abstract

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Macrolide and rifampin resistance developed on a horse breeding farm after widespread use was instituted for treatment of subclinical pulmonary lesions in foals. Resistance occurred in 6 (24%) of 25 pretreatment and 8 (62%) of 13 (62%) posttreatment isolates from affected foals. Drug-resistant isolates formed 2 distinct genotypic clusters.

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