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High diversity of coagulase negative staphylococci species in wild boars, with low antimicrobial resistance rates but detection of relevant resistance genes

AuthorsMistourath Mama, Olouwafemi; Ruiz-Ripa, Laura; Lozano, Carmen; González-Barrio, David ; Ruiz Fons, Francisco ; Torres, Carmen
KeywordsCoagulase-negative staphylococci
Wild boars
Antimicrobial resistance
S. sciuri
Issue Date2019
CitationComparative Immunology, Microbiology and Infectious Diseases 64: 125-129 (2019)
AbstractThis work was focused to determine the prevalence and the species diversity of coagulase-negative staphylococci (CoNS) in wild boars, and to study their antimicrobial resistance phenotype and genotype. Nasal samples of 371 wild boars from six Spanish regions were collected for CoNS recovery. The identification was performed by MALDI-TOF mass-spectrometry. Antimicrobial susceptibility for eight antimicrobial agents was studied by disc-diffusion method and the presence of 31 antimicrobial resistance genes by PCR. CoNS were detected in nasal samples of 136/371 animals tested (36.6%), and 161 isolates were obtained (1–3/animal); a high diversity of species was found (n = 17), with predominance of S. sciuri (n = 64), S. xylosus (n = 21) and S. chromogenes (n = 17). Among CoNS isolates, 22.4% showed resistance to at least one antimicrobial tested. Tetracycline-resistance phenotype was the most frequently detected (10.5%), generally mediated by tet(K) gene [associated or not with tet(L)]. Other relevant resistance genes were identified including unusual ones [mecA, erm(B), erm(F), mphC, erm(43), msr(A)/msr(B), lnu(A), dfrG, fexA, and catpC221]. This is the first study in which CoNS isolates from wild boars are analysed. The knowledge of antimicrobial phenotype and genotype of CoNS in natural ecosystems is highly important since these staphylococcal species can act as vectors of relevant antimicrobial resistance mechanisms.
Publisher version (URL)https://doi.org/10.1016/j.cimid.2019.03.006
Appears in Collections:(IREC) Artículos
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