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Online Journal of Veterinary Research

Volume 21(10):681-687, 2017.

Antibiotic resistance and prevalence of Listeria monocytogenes in food

Fateme Sahebi MSc 1, Akram Astani2,4, Negar Hamidian MSc 3, Ali Heydari3, Fateme Akrami Mohajeri2,5*


1,3,5 Food Safety and Hygiene, 2Zoonotic Diseases Research Center, 3Public Health , 4Microbiology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.




Sahebi F, Astani A, Hamidian N, Heydari A, Mohajeri FA., Antibiotic resistance and prevalence of Listeria spp. isolates in fast food, Onl J Vet Res., 21(10):681-687, 2017. Consumption of fast food is now common and Listeria monocytogenes a pathogenic bacteria, is transmitted through food. Authors report prevalence and antibiotic resistance of Listeria spp isolates from fast food sold in sandwich shops in Yazd, Iran. Two hundred eighty ready-to-eat food samples were collected for isolation of Listeria spp by enrichment, selective culture media and biochemical tests. Positive samples were confirmed by PCR. Thirty five samples (12.5%) were contaminated by Listeria monocytogenes 14 (5%), L innocua 18 (6.4 %) and L seeligeri 3 (1.1%). Listeria monocytogenes was found in salads of olivieh 6.2%, season 4.4%, pasta 6.5% and chicken 4.3%, and in chicken liver 2.1%. Listeria monocytogenes was resistant to ampicillin 64%, tetracycline 50%, penicillin 42% and chloramphenicol 35%. In food samples 42.8% bacteria were resistant to 1 antibiotic, 21.4% to 2 and 35.7% to several. Lowest resistance to antibiotics was found in Listeria seeligeri and highest in Listeria innocua

Keywords: Listeria monocytogenes, fast food, prevalence, resistance, PCR.