Clonal diversity of Staphylococcus aureus originating from the small ruminants goats and sheep

M. Concepción Porrero, Henrik Hasman, Ana I. Vela, Jose F. Fernández-Garayzábal, Lucas Dominguez, Frank Møller Aarestrup

Research output: Contribution to journalJournal articleResearchpeer-review


Staphylococcus aureus is an important pathogen in humans and many animal species. The
prevalence of different clonal types in animal species remains largely unknown. We
analyzed 267 S. aureus from intramammary infections in goats (47) and sheep (220) by spa
typing, multi-locus sequence typing (MLST) and antimicrobial susceptibility. The most
frequent spa types in goats were t337 (N = 9), t759 (N = 6) and t1534 (N = 5). Sheep isolates
mainly belonged to spa types t1534 (N = 72), t2678 (N = 29) and t3576 (N = 20). Eighteen
novel spa-types were observed; two from goat strains, 13 from sheep and three in both
species. The majority of the goat strains grouped in MLST CC133 (N = 10) and ST522
(N = 10), followed by CC9 (N = 9), while the majority of the sheep strains were of ST522
(N = 108) followed by CC133 (N = 86) and CC130 (N = 11). Nine new MLST types were
detected; three in goat and sheep isolates (ST1739, ST1758 and ST1780), two identified in
goats only (ST1740 and ST2061) and four in sheep only (ST1742, ST1743, ST1781 and
ST2011). Strains showed resistance below 20% against penicillin and tetracycline; a strong
association between CC-types and penicillin resistance was observed. No resistance was
detected to cefoxitin, quinupristin-dalfopristin, rifampicin and vancomycin. This study
suggests that ST522 is the most common S. aureus clone associated with small ruminants
followed by CC133.
Original languageEnglish
JournalVeterinary Microbiology
Pages (from-to)157-161
Publication statusPublished - 2012


  • Staphylococcus aureus
  • Spa
  • MLST
  • Animals
  • Goats
  • Sheep


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