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乳牛与人感染大肠杆菌O(157)有关。作者于1993年5月至1994年7月在乳牛场进行了O_(157)的检测,以了解季节,年龄及处理因素对排菌的影响。从母牛、小母牛及新生牛共收集肛试
Dairy cows are associated with human infection of E. coli O (157). The authors conducted O_ (157) tests on dairy farms from May 1993 to July 1994 to understand the effects of season, age and treatment on row bacteria. Collect anal tests from cows, heifers and newborn cattle