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Published on: September 3, 2016
Diversity of Staphylococcus aureus isolated from nares of ruminants
Igor Loncaric1, Helga Keinprecht1,2, Emmanuel Irimaso3
1Institute of Microbiology, University of Veterinary Medicine Vienna, Vienna 1210, Austria.
Aims:
To examine the diversity of Staphylococcus aureus isolated from nasal swabs of ruminants in Rwanda.
Methods And Results:
A total of 454 nasal swabs from 203 cows, 170 goats, and 81 sheep were examined for the presence of S. aureus, and 30 S. aureus isolates were detected and characterized pheno- and genotypically. Resistance to penicillin and/or tetracycline was observed. The isolates were assigned to eight different spa types (t21057 (novel), t10103, t18853, t20842, t318, t355, t458, and t9432) belonging to six clonal complexes (CCs) (CC152, CC30, CC3591, CC3666, CC522, and CC97). Panton-Valentine leukocidin (PVL) genes (lukF-PV/lukS-PV), the bovine leukocidin genes (lukM/lukF-P83), and the human and bovine variants of the toxic shock syndrome toxin gene tst-1 variants were detected.
Conclusion:
These findings demonstrate that the nares of ruminants in Rwanda are colonized with mastitis-associated S. aureus, including lineages that are also carried by humans, underscoring the zoonotic risk, especially for livestock keepers. These results highlight the crucial importance of hygiene measures when handling livestock.
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