Study of Listeria monocytogenes strains’ prevalence in some local fish market of Shahr-e Kord, Iran

Subject Areas :

Esmail Pirali Kheirabadi ¹ ( Department of Fisheries Science, Faculty of Natural Resources and Earth Sciences, University of Shahrekord, Shahrekord, Iran. )
Seyed Pezhman Hosseini Shekarabi ² ( Department of Fisheries Science, Science and Research Branch, Islamic Azad University, Tehran, Iran. )

Received: 2017-10-29 Accepted : 2018-02-21 Published : 2018-02-20

Keywords: Antibiotic sensitivity, Listeria monocytogenes, Rainbow trout, Shahr-e Kord,

Abstract :

Contamination of seafood products to pathoges like Listeria is a for consumers. The aim of this study was to evaluate the field prevalence and typing of Listeria monocytogenes in the local fish market of Shahr-e Kord, Iran. Antibiotic susceptibility of the isolated Listeria was also carried out by the antibiotic disc diffusion method using 13 different antibiotics. A total of 100 rainbow trout were randomly collected from retail market in Shahr-e Kord for examination of the prevalence and typing of Listeria species using biochemical methods. Four isolates of Listeria were identified; One isolate of L. inovaii and 3 islolates of L. monocytogenes. All four isolates showed the highest antibiotic sensitivity (100 % susceptibility) to five antibiotics including cotrimoxazole, tetracycline, gentamicin, erythromosine, and vancomycin. However, all strains showed resistance to oxacillin. As L. monocytogenesis is of the most important pathogens in humans, fish contamination to different species of Listeria could be a potential risk and requires more attention.