Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, P.O.Box 66, FI-00014 Helsinki University, Finland.
Int J Food Microbiol. 2010 Apr 30;139(1-2):64-9. doi: 10.1016/j.ijfoodmicro.2010.02.006. Epub 2010 Feb 12.
The tonsils of 630 pigs from 45 English farms using three different rearing methods (Assured British Pigs, Open Management and Organic) were examined between 2003 and 2005 in order to investigate if the low incidence of human yersiniosis could be attributed to a low prevalence of enteropathogenic Yersinia among English pigs. In addition, different isolation methods were compared, possible differences in prevalence among pigs were studied, as well as the prevalence of different bioserotypes of enteropathogenic Yersinia. A high prevalence and a wide diversity of bioserotypes of enteropathogenic Yersinia compared to other European countries were observed. The prevalence of pathogenic Yersinia enterocolitica was 44% and of Yersinia pseudotuberculosis 18%. Overall, 60% of pigs carried enteropathogenic Yersinia. Y. pseudotuberculosis was detected on 78% of farms and Y. enterocolitica on 69%. The most common bioserotypes of Y. enterocolitica were 2/O:9 (33%) and 2/O:5 (26%), and of Y. pseudotuberculosis 2/O:3 (34%), 1/O:1 (26%) and 1/O:4 (24%). Cold enrichment gave the highest isolation rate for both species. Y. enterocolitica was more prevalent (P<0.001) and Y. pseudotuberculosis less prevalent (P<0.05) in winter than in summer in Eastern England. Y. enterocolitica was more common in Eastern England and in assured British pigs, whereas Y. pseudotuberculosis was more common in Western England and in organic pigs. Y. pseudotuberculosis 1/O:1 was predominant (P<0.05) in Western England. Types 1/O:4 (P<0.05) and 2/O:3 (P<0.001) predominated in Eastern England. The high prevalence of Y. enterocolitica bioserotypes 2/O:9 and 2/O:5 found in this study suggests that English pigs are an important reservoir of these bioserotypes whereas in other European countries bioserotype 4/O:3 predominates.
2003 年至 2005 年间，对来自 45 个采用三种不同饲养方式（保证英国猪、开放式管理和有机）的 630 头猪的扁桃体进行了检查，以调查英国猪中致病性耶尔森氏菌的低发病率是否归因于肠致病性耶尔森氏菌的低流行率。此外，还比较了不同的分离方法，研究了猪之间的流行率差异，以及不同肠致病性耶尔森氏菌的生物血清型的流行率。与其他欧洲国家相比，观察到肠致病性耶尔森氏菌的高流行率和广泛的生物血清型多样性。致病性肠炎耶尔森氏菌的流行率为 44%，假结核耶尔森氏菌的流行率为 18%。总的来说，60%的猪携带肠致病性耶尔森氏菌。假结核耶尔森氏菌在 78%的农场和肠炎耶尔森氏菌在 69%的农场被检出。肠炎耶尔森氏菌最常见的生物血清型为 2/O:9（33%）和 2/O:5（26%），假结核耶尔森氏菌最常见的生物血清型为 2/O:3（34%）、1/O:1（26%）和 1/O:4（24%）。冷增菌对两种细菌的分离率最高。在英格兰东部，冬季肠出血性大肠杆菌的流行率（P<0.001）高于夏季，假结核耶尔森氏菌的流行率（P<0.05）低于夏季。在英格兰东部和保证英国猪中，肠炎耶尔森氏菌更为常见，而在英格兰西部和有机猪中，假结核耶尔森氏菌更为常见。在英格兰西部，1/O:1 是主要的（P<0.05）。在英格兰东部，1/O:4（P<0.05）和 2/O:3（P<0.001）占主导地位。在本研究中发现的肠炎耶尔森氏菌生物血清型 2/O:9 和 2/O:5 的高流行率表明，英国猪是这些生物血清型的重要储存宿主，而在其他欧洲国家，生物血清型 4/O:3 占主导地位。
