Fenwick S G, McCarthy M D
Department of Veterinary Pathology and Public Health, Massey University, Palmerston North.
N Z Med J. 1995 Jul 14;108(1003):269-71.
Infections with Yersinia enterocolitica are a significant cause of gastroenteritis in many countries, However, little information is available on the incidence of human disease in New Zealand. A study was performed between January 1988 and December 1993 to investigate aspects of the epidemiology of yersiniosis in the Auckland region including prevalence, age and sex distribution, strain definition and seasonal occurrence.
Culture of 231 128 faecal samples for enteric pathogens was performed at Diagnostic Laboratory, a community laboratory in Auckland, between January 1988 and December 1993. All yersinia isolates recovered were sent to the department of veterinary pathology and public health, Massey University for further typing. Relevant data were entered into a database and reviewed at the end of the study period.
1469 of the samples, representing 941 cases, were positive for strains of yersinia during the study period, a crude isolation rate of 0.6%. A single strain from each of the cases was further typed and yersinia enterocolitica was found to constitute the majority of the isolates (918), making it the third most common enteric pathogen isolated after campylobacter and salmonella. Of the strains isolated, 98% were recognised human pathogens, with biotype 4, serotype 0:3 being the most frequently recovered, as it is worldwide. No clear seasonal pattern emerged although most isolations were made in the autumn-winter period. The age distribution showed two peaks, 0-4 (17.6%) and 25-29 year olds (13%). Infections in males outnumbered those in females (56:44).
The results of this study show that Y enterocolitica is an important enteric pathogen in the Auckland region, particularly in children and young adults and it has identified a need for a case-control study to assess the relevant risk factors for acquisition of Y enterocolitica infections in New Zealand.
小肠结肠炎耶尔森菌感染是许多国家肠胃炎的重要病因，然而，关于新西兰人类疾病的发病率信息却很少。1988年1月至1993年12月期间进行了一项研究，以调查奥克兰地区耶尔森菌病的流行病学情况，包括患病率、年龄和性别分布、菌株定义以及季节性发病情况。
1988年1月至1993年12月期间，在奥克兰的一家社区诊断实验室对231128份粪便样本进行肠道病原体培养。所有分离出的耶尔森菌菌株都被送往梅西大学兽医病理学和公共卫生系进行进一步分型。相关数据被录入数据库，并在研究期结束时进行审查。
在研究期间，1469份样本（代表941例病例）的耶尔森菌菌株呈阳性，粗分离率为0.6%。对每个病例的单个菌株进行进一步分型，发现小肠结肠炎耶尔森菌占分离菌株的大多数（918株），使其成为仅次于弯曲杆菌和沙门氏菌的第三大最常见肠道病原体。在分离出的菌株中，98%被确认为人类病原体，生物型4、血清型0:3是最常分离到的，这与全球情况一致。虽然大多数分离是在秋冬季节进行的，但没有出现明显的季节性模式。年龄分布显示有两个高峰，0至4岁（17.6%）和25至29岁（13%）。男性感染人数多于女性（56:44）。
本研究结果表明，小肠结肠炎耶尔森菌是奥克兰地区重要的肠道病原体
