Neosporosis-Like Abortions in a Herd of Dairy Cattle
Neosporosis-Like Abortions in a Herd of Dairy Cattle
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奶牛群中类似新孢子虫病的流产
DOI：
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发表时间：
1989
影响因子：
1.5
通讯作者：
J. Dubey
中科院分区：
文献类型：
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作者：
J. Thilsted;J. Dubey
来自新墨西哥州中北部一家拥有240头奶牛的干地荷斯坦奶牛的29头奶牛在大约5个月的时间里流产了。9个流产的胎儿被尸检，除了1个以外，所有的胎儿都在怀孕5到7个月之间。胎儿组织镜检发现9例胎儿中有7例为局灶性坏死性脑炎和非化脓性心肌炎。在一些胎儿中观察到的其他病变包括局灶性肝坏死、非化脓性肌炎、局灶性坏死性胎盘炎、局灶性非化脓性肺炎和局灶性非化脓性肾炎。在2个胎儿的大脑坏死灶附近和第三个胎儿的肾脏中观察到几组犬状新孢子虫原虫。没有发现其他导致流产的原因。
Twenty-nine cows from a 240-cow drylot Holstein dairy in north-central New Mexico aborted over a period of approximately 5 months. Nine aborted fetuses were necropsied, and all but 1 of the fetuses were between 5 and 7 months of gestation. Microscopic examination of fetal tissues revealed focal necrotizing encephalitis and nonsuppurative myocarditis in 7 of the 9 fetuses. Additional lesions observed in some fetuses were focal hepatic necrosis, nonsuppurative myositis, focal necrotizing placentitis, focal nonsuppurative pneumonia, and focal nonsuppurative nephritis. A few groups of Neospora caninum -like protozoan organisms were observed adjacent to necrotic foci in the brain of 2 fetuses and in the kidney of a third fetus. No other cause of abortion was detected.