作为大肠杆菌O157宿主的牛饮水槽
Cattle water troughs as reservoirs of Escherichia coli O157.
作者信息
LeJeune J T, Besser T E, Hancock D D
机构信息
Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164, USA.
出版信息
Appl Environ Microbiol. 2001 Jul;67(7):3053-7. doi: 10.1128/AEM.67.7.3053-3057.2001.
Abstract
Environmental survival of Escherichia coli O157 may play an important role in the persistence and dissemination of this organism on farms. The survival of culturable and infectious E. coli O157 was studied using microcosms simulating cattle water troughs. Culturable E. coli O157 survived for at least 245 days in the microcosm sediments. Furthermore, E. coli O157 strains surviving more than 6 months in contaminated microcosms were infectious to a group of 10-week-old calves. Fecal excretion of E. coli O157 by these calves persisted for 87 days after challenge. Water trough sediments contaminated with feces from cattle excreting E. coli O157 may serve as a long-term reservoir of this organism on farms and a source of infection for cattle.
摘要
大肠杆菌O157在环境中的存活可能对该菌在农场中的持续存在和传播起到重要作用。利用模拟牛饮水槽的微观世界研究了可培养且具传染性的大肠杆菌O157的存活情况。可培养的大肠杆菌O157在微观世界沉积物中存活了至少245天。此外，在受污染微观世界中存活超过6个月的大肠杆菌O157菌株对一组10周龄小牛具有传染性。这些小牛在受到攻击后，大肠杆菌O157的粪便排泄持续了87天。被排泄大肠杆菌O157的牛的粪便污染的饮水槽沉积物可能是该菌在农场中的长期储存库以及牛的感染源。
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