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尼日利亚鸡肉和禽肉中希杜迪菲沙门氏菌的发生与特性

Occurrence and characterization of Salmonella Hiduddify from chickens and poultry meat in Nigeria.

作者信息

Raufu Ibrahim, Hendriksen Rene S, Ameh J A, Aarestrup Frank M

机构信息

Faculty of Veterinary Medicine, Department of Veterinary Microbiology, University of Maiduguri, Maiduguri, Nigeria.

出版信息

Foodborne Pathog Dis. 2009 May;6(4):425-30. doi: 10.1089/fpd.2008.0150.

Abstract

The objective of this study was to determine the prevalence of Salmonella serovars and the antimicrobial susceptibility in chickens and poultry meat products in rural areas in Nigeria. The study was an observational cross-sectional investigation in which the target population included exotic and local chickens in Maiduguri main markets, chickens from farms, and free-range local chickens. A total of 865 samples were collected from feces, kidney, lungs, cecum, intestine, liver, heart, gizzard, and cloacal swabs from 525 different chickens. Salmonella was isolated from 130 of the samples. A stratified random sampling technique was used to select 41 isolates out of the 130 strains for serotyping, pulsed-field gel electrophoresis (PFGE), and antimicrobial susceptibility testing. Thirty-nine out of the 41 samples serotyped yielded Salmonella Hiduddify; two yielded a rough Salmonella serovar. The 39 Salmonella Hiduddify isolates and the two rough isolates were highly similar by PFGE typing, indicating that all of the isolates were of the same serovar. A low frequency of resistance was found among the isolates, except for resistance to ciprofloxacin for which 23 (56%) of the isolates tested exhibited resistance. This study documents for the first time the isolation of Salmonella Hiduddify in chickens and shows that this serovar is widespread in rural areas in Nigeria. It also documents a high frequency of fluoroquinone resistance in the isolates indicating the presence of selective pressure in the environment. Further studies should be conducted to reveal if the serovar is present in eggs and causes salmonellosis among the general population.

摘要

本研究的目的是确定尼日利亚农村地区鸡及禽肉产品中沙门氏菌血清型的流行情况及抗菌药物敏感性。该研究为观察性横断面调查,目标人群包括迈杜古里主要市场的外来鸡和本地鸡、农场鸡以及散养本地鸡。从525只不同鸡的粪便、肾脏、肺、盲肠、肠道、肝脏、心脏、砂囊和泄殖腔拭子中总共采集了865份样本。130份样本中分离出了沙门氏菌。采用分层随机抽样技术从130株菌株中选取41株进行血清分型、脉冲场凝胶电泳(PFGE)和抗菌药物敏感性测试。41份进行血清分型的样本中有39份鉴定为希杜迪菲沙门氏菌;两份鉴定为粗糙型沙门氏菌血清型。通过PFGE分型,39株希杜迪菲沙门氏菌分离株和两株粗糙型分离株高度相似,表明所有分离株属于同一血清型。除对环丙沙星有耐药性外,分离株中的耐药频率较低,测试的分离株中有23株(56%)对环丙沙星表现出耐药性。本研究首次记录了在鸡中分离出希杜迪菲沙门氏菌,并表明该血清型在尼日利亚农村地区广泛存在。研究还记录了分离株中氟喹诺酮耐药性的高频率,表明环境中存在选择压力。应进一步开展研究,以揭示该血清型是否存在于鸡蛋中以及是否在普通人群中引起沙门氏菌病。

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