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Profiles of Non- Staphylococci in Retail Pork and Slaughterhouse Carcasses: Prevalence, Antimicrobial Resistance, and Genetic Determinant of Fusidic Acid Resistance

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Specialty Biotechnology
Date 2022 Mar 21
PMID 35310565
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Abstract

As commensal colonizers in livestock, there has been little attention on staphylococci, especially non- staphylococci (NAS), contaminating meat production chain. To assess prevalence of staphylococci in retail pork and slaughterhouse carcass samples in Korea, we collected 578 samples from Korean slaughterhouses (n=311) and retail markets (n=267) for isolation of staphylococci and determined antimicrobial resistance phenotypes in all the isolates. The presence of and prevalence of -family genes (, , , and ) and mutations in genes were examined in fusidic acid resistant isolates. A total of 47 staphylococcal isolates of 4 different species ( n=4; , n=1; , n=10; , n=32) were isolated. Fusidic acid resistance were confirmed in 9/10 and all of the 32 (previously ) isolates. Acquired fusidic acid resistance genes were detected in all the resistant strains; and in and in . Multi-locus sequence type analysis revealed that ST63 (n=10, 31%) and ST30 (n=8, 25%) genotypes were most prevalent among fusidic acid resistant isolates. In conclusion, the high prevalence of -family genes in and strains isolated from pork indicated that NAS might act as a reservoir for fusidic acid resistance gene transmissions in pork production chains.

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