Multilocus sequence typing of intercontinental bovine Staphylococcus aureus isolates

E. M. Smith, L. E. Green*, G. F. Medley, H. E. Bird, L. K. Fox, Y. H. Schukken, J. V. Kruze, A. J. Bradley, R. N. Zadoks, C. G. Dowson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

133 Citations (Scopus)


A total of 258 bovine-associated Staphylococcus aureus isolates from the United States, Chile, and the United Kingdom, plus the reference isolate S. aureus Newbould 305 (NCIMB 702892), were analyzed by multilocus sequence typing (MLST). A collection of previously characterized United Kingdom isolates were also included in the analysis. The results demonstrated that MLST is suitable for the differentiation of bovine S. aureus isolates from various sites (milk, teat skin, milking machine unit liners, hands, and bedding) and countries. The theory of the host specificity of S. aureus is supported by the detection of a previously undescribed clonal complex that comprised 87.4% of the isolates studied, with representatives from all geographic locations investigated. This suggests that a single clonal group has achieved a widespread distribution and is responsible for the majority of infections. Some sequence types (STs; ST25, ST115, ST124, and ST126) demonstrated site specificity, as they were significantly (P < 0.05) associated with milk or teat skin.

Original languageEnglish
Pages (from-to)4737-4743
Number of pages7
JournalJournal of Clinical Microbiology
Issue number9
Publication statusPublished - Sept 2005

ASJC Scopus subject areas

  • Microbiology (medical)


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