Prevalence and antimicrobial resistance of Listeria species isolated from milk and dairy products in Iran

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• 作者：Ebrahim Rahimi ; Mehrdad Ameri ; Hassan Momtaz
• 关键词：Antimicrobial resistance ; Dairy products ; Listeria spp.
• 刊名：Food Control
• 出版年：2010
• 出版时间：November 2010
• 年：2010
• 卷：21
• 期：11
• 页码：1448-1452
• 全文大小：271 K

文摘

The objective of this study was to determine the prevalence of Listeria spp. in milk and dairy products in Isfahan province, Iran. From March 2007 to September 2009, a total of 594 samples of various milk and dairy products were obtained from randomly selected retail stores. Using conventional bacteriologic method, 55 samples (9.3 % ) were positive for Listeria spp. The highest prevalence of Listeria was found in raw sheep milk samples (22.6 % ), followed by cheese samples (18.9 % ). The most species recovered was Listeria innocua (58.2 % ); the remaining isolates were Listeria monocytogenes (32.7 % ) and Listeria seeligari (9.1 % ). Overall, 54 Listeria isolates (98.2 % ) were resistant to one or more antimicrobial agents. Resistance to nalidixic acid was the most common finding (96.4 % ). All Listeria isolates were susceptible to vancomycin. The results of this study indicate the potential risk of infection with Listeria in people consuming raw and unpasteurized milk and dairy products.