Multidrug-resistant coagulase-negative Staphylococci in food animals
Article first published online: 21 AUG 2012
© 2012 The Authors Journal of Applied Microbiology © 2012 The Society for Applied Microbiology
Journal of Applied Microbiology
Volume 113, Issue 5, pages 1027–1036, November 2012
How to Cite
Bhargava, K. and Zhang, Y. (2012), Multidrug-resistant coagulase-negative Staphylococci in food animals. Journal of Applied Microbiology, 113: 1027–1036. doi: 10.1111/j.1365-2672.2012.05410.x
- Issue published online: 17 OCT 2012
- Article first published online: 21 AUG 2012
- Accepted manuscript online: 20 JUL 2012 11:51AM EST
- Manuscript Accepted: 16 JUL 2012
- Manuscript Revised: 13 JUL 2012
- Manuscript Received: 14 JUN 2012
- multidrug resistance;
To study the antimicrobial resistance of coagulase-negative staphylococci (CoNS) in animals.
Methods and Results
In the present study, a total of 87 CoNS recovered from food animals were characterized by antimicrobial susceptibility testing, resistance gene identification and conjugation. Of the seven species studied, Staphylococcus lentus, Staphylococcus sciuri, Staphylococcus xylosus and Staphylococcus haemolyticus accounted for over 96% of the isolates. In addition to β-lactam resistance (100%), high percentages of CoNS were resistant to tetracycline (67·8%), erythromycin (36·7%), clindamycin (27·5%) and quinopristin/dalfopristin (14·9%). Importantly, 47 (54%) isolates were resistant to at least three antimicrobial classes, including six CoNS resistant to six antimicrobial classes. The common genes for the above-mentioned resistance phenotypes were mec(A), tet(M), erm(A) and vga(A)LC, which were identified from 68·7%, 61%, 56·2% and 69·2% of the isolates, respectively. tet(M) was conjugatively transferable from 10 tetracycline-resistant CoNS to a Enterococcus strain, underlining the potential of antimicrobial resistance transfer from Staphylococcus to the commensal bacteria in human.
Multidrug resistance and resistance to non-β-lactam antimicrobials are common in CoNS in animals.
Significance and Impact of the Study
The data improve our understanding on the extent to which CoNS contribute to the dissemination of antimicrobial resistance in the food production environment.