Detection of a mecC-positive Staphylococcus saprophyticus from bovine mastitis in Argentina.

Autor: Srednik ME; Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Microbiología, Av. Chorroarín 280, C1427CWO Buenos Aires, Argentina., Archambault M; Université de Montréal, Faculté de Médecine Vétérinaire, 3200 rue Sicotte, Saint-Hyacinthe, Québec J2S 7C6, Canada; Regroupement de recherche pour un lait de qualité optimale (Op+Lait), Canada; Canadian Bovine Mastitis and Milk Quality Research Network, Canada., Jacques M; Université de Montréal, Faculté de Médecine Vétérinaire, 3200 rue Sicotte, Saint-Hyacinthe, Québec J2S 7C6, Canada; Regroupement de recherche pour un lait de qualité optimale (Op+Lait), Canada; Canadian Bovine Mastitis and Milk Quality Research Network, Canada., Gentilini ER; Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Microbiología, Av. Chorroarín 280, C1427CWO Buenos Aires, Argentina. Electronic address: egenti@fvet.uba.ar.
Jazyk: angličtina
Zdroj: Journal of global antimicrobial resistance [J Glob Antimicrob Resist] 2017 Sep; Vol. 10, pp. 261-263. Date of Electronic Publication: 2017 Jul 18.
DOI: 10.1016/j.jgar.2017.05.016
Abstrakt: Introduction: Bovine mastitis causes important economic losses in the dairy industry. Coagulase-negative staphylococci (CNS) are a group of bacteria commonly isolated from bovine mastitis and can display resistance to a wide range of antimicrobial agents.
Objectives: The objective of this study was to determine staphylococcal resistance towards β-lactam, macrolide and lincosamide antimicrobials in quarters previously treated with third-generation cephalosporin and after lincosamide intramammary therapy.
Methods: Sick quarters of eighteen cows from Villaguay, Entre Ríos (Argentina) with clinical mastitis were studied. All staphylococcal isolates were tested by disk diffusion for their antimicrobial susceptibilities. Cefoxitin resistance was investigated by PCR and sequencing for both the mecA and mecC genes.
Results: Resistances to penicillin, oxacillin and cefoxitin were observed, whereas no resistance to macrolide and lincosamide was detected. A cefoxitin-resistant Staphylococcus saprophyticus was found to be mecA-negative but mecC-positive.
Conclusions: This study reports for the first time the mecC gene from a CNS in bovine mastitis in South America. Because CNS may act as reservoirs of antimicrobial resistance genes, they can be seen as a potential public health threat with respect to antimicrobial resistance and the development of multiple resistance. Also, the emergence of methicillin-resistant phenotypes will limit therapeutic options.
(Copyright © 2017 International Society for Chemotherapy of Infection and Cancer. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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