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http://dx.doi.org/10.9721/KJFST.2021.53.4.495

Prevalence, virulence characteristics and antimicrobial resistance of Listeria monocytogenes isolated from salmon products  

Jin, Young Hee (Seoul Metropolitan Government Research Institute of Public Health & Environment)
Ryu, Seung Hee (Seoul Metropolitan Government Research Institute of Public Health & Environment)
Kwak, Jae Eun (Seoul Metropolitan Government Research Institute of Public Health & Environment)
Kim, Ri Ra (Seoul Metropolitan Government Research Institute of Public Health & Environment)
Choi, Young Hee (Seoul Metropolitan Government Research Institute of Public Health & Environment)
Lee, Myung Sook (Seoul Metropolitan Government Research Institute of Public Health & Environment)
Hwang, In Sook (Seoul Metropolitan Government Research Institute of Public Health & Environment)
Publication Information
Korean Journal of Food Science and Technology / v.53, no.4, 2021 , pp. 495-500 More about this Journal
Abstract
This study investigated the prevalence, serotypes, virulence genes, and antimicrobial resistance patterns of Listeria monocytogenes isolates collected from salmon products. A total of 16 out of 65 salmon products (24.6%) were positive for L. monocytogenes. Bacteria were most frequently identified in smoked salmon products (15/53, 28.3%). Serological tests revealed that serotype 1/2b (62.5%) was the predominant serotype of L. monocytogenes, followed by 1/2a (37.5%). All isolates harbored 10 virulence-associated genes (inlA, inlB, plcA, plcB, hlyA, actA, prf, fbpA, iap, and mpl), confirming their potential pathogenicity. The isolates of L. monocytogenes showed resistance to cefotetan (100%), cefotaxime (87.5%), cefepime (31.3%), erythromycin (6.3%), and tetracycline (6.3%); however, most of the strains were susceptible to antimicrobials except cephalosporins. These results provide useful information regarding the contamination of salmon products with L. monocytogenes, which may have implications for public health.
Keywords
Listeria monocytogenes; salmon products; virulence genes; antimicrobial resistance;
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