Outbreaks of a Methicillin-Resistant Clone ST398-t011 in a Hungarian Equine Clinic: Emergence of Rifampicin and Chloramphenicol Resistance After Treatment with These Antibiotics.

Between July 2011 and May 2016, a total of 40 strains originating from 36 horses were confirmed as methicillin resistant (methicillin-resistant [MRSA]) in a university equine clinic. An additional 10 MRSA strains from 36 samples of clinic workers were obtained in October 2017. The first equine isolate represented the sequence type ST398, -type t011, and SCC IV.