Koopmans M, van Wuijckhuise-Sjouke L, Schukken Y H, Cremers H, Horzinek M C
Viral Gastroenteritis Unit, Centers for Disease Control, Atlanta, GA 30333.
Am J Vet Res. 1991 Nov;52(11):1769-73.
An epidemiologic survey was performed to determine the incidence of torovirus infections in 2 disease entities of cattle: diarrhea of replacement calves up to 2 months old, and winter dysentery of adult cattle. Samples were obtained from 187 diarrheal and 115 healthy calves from 15 farms, as well as 149 diarrheal and 67 healthy cows from 27 farms with or without winter dysentery. Enzyme-linked immunosorbent assays for detection of torovirus, rotavirus, and coronavirus antigen in feces, and of torovirus and coronavirus antibodies in serum were used to monitor infections in these groups. Torovirus was detected in 9 of the 15 farms in the study, and in 6% of calves with diarrhea, which was significantly higher than in healthy calves (2%). Seroconversion to torovirus was found significantly more often after winter dysentery episodes than on farms without a disease history; coronavirus seroconversion was less common.
开展了一项流行病学调查，以确定牛的两种疾病实体中托罗病毒感染的发生率：2月龄以下育成犊牛腹泻以及成年牛冬季痢疾。从15个农场的187头腹泻犊牛和115头健康犊牛，以及27个有或无冬季痢疾的农场的149头腹泻奶牛和67头健康奶牛中采集样本。采用酶联免疫吸附测定法检测粪便中的托罗病毒、轮状病毒和冠状病毒抗原，以及血清中的托罗病毒和冠状病毒抗体，以监测这些群体中的感染情况。在该研究的15个农场中，有9个检测到托罗病毒，腹泻犊牛中有6%检测到托罗病毒，这显著高于健康犊牛（2%）。冬季痢疾发作后，托罗病毒血清转化的情况明显比无疾病史的农场更常见；冠状病毒血清转化则较少见。
