Transmission and control of Escherichia coli O157:H7 -: A review

被引:96
|
作者
Bach, SJ
McAllister, TA
Veira, DM
Gannon, VPJ
Holley, RA
机构
[1] Agr & Agri Food Canada, Res Ctr, Lethbridge, AB T1J 4B1, Canada
[2] Range Res Unit, Kamloops, BC V2B 8A9, Canada
[3] Hlth Canada, Anim Dis Res Inst, Lethbridge, AB T1J 3Z4, Canada
[4] Univ Manitoba, Dept Food Sci, Winnipeg, MB R3T 2N2, Canada
关键词
Escherichia coli O157 : H7; cattle; sources; diet; transmission;
D O I
10.4141/A02-021
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Escherichia coli 157:H7 has evolved as an important foodborne pathogen since its initial description in 1982. Outbreaks of illness associated with E. coli O157:H7 have been reported throughout the northern hemisphere, most frequently in Canada, the United States, Japan, and the United Kingdom. In Canada, infections due to E. coli O157:H7 appear to be more common in the western provinces than in the east, in rural vs. urban environments, and during summer as opposed to winter months. Undercooked ground beef has been implicated as the primary vehicle in E. coli O157:H7 infection, but contaminated fruits, vegetables and water have also been linked to E. coli O157:H7 outbreaks. Epidemiological investigations demonstrate that dairy and beef cattle are primary reservoirs of this organism, carrying it asymptomatically and shedding it intermittently and seasonally in their feces. Surveys in Canada and the United States indicate widespread distribution of E. coli O157:H7 in cattle operations. The prevalence of E. coli O157:H7 in cattle has been increasing in recent reports, likely due to the development of more sensitive methods for the detection of the organism. Escherichia coli O157:H7 has been isolated from feed, water for livestock, manure, soil and flies, all of which represent potential sources of contamination for cattle and their environment. To date, effective methods for controlling E. coli O157:H7 in cattle have not been identified, although dietary manipulation, vaccination and bacteriophage therapy have been reported to have potential as intervention strategies. Effective control of E. coli O157:H7 requires reducing the frequency and intensity of fecal shedding of this pathogen by cattle, in addition to targeting environmental sources of the organism.
引用
收藏
页码:475 / 490
页数:16
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