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首页> 外文期刊>Tropical Animal Health and Production >Histophilus somni-induced infections in cattle from southern Brazil
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Histophilus somni-induced infections in cattle from southern Brazil

机译：Histophilus somni引起的巴西南部牛感染

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摘要

The sudden death of three calves, one diarrheic calf, and one aborted fetus from four farms in southern Brazil was investigated. Two Histophilus somni-associated syndromes were identified: systemic histophilosis (n = 4) and abortion (n = 1). The principal pathological findings included vasculitis, meningoencephalitis with thrombosis, necrotizing myocarditis, renal infarctions, hepatic abscesses, and bronchopneumonia. PCR assays were used to amplify specific amplicons of the ovine herpesvirus 2, bovine herpesvirus 1 and -5, Listeria monocytogenes, H. somni, and pestivirus; bovine group A rotavirus (BoRV-A) and bovine coronavirus (BCoV) were investigated in calves with diarrhea. H. somni DNA was amplified in tissues from all calves and the brain of the aborted fetus with pathological alterations consistent with histophilosis. All other PCR assays were negative; BoRV-A and BCoV were not identified. These findings confirm the participation of H. somni in the pathological alterations observed in this study and represent the first description of histophilosis in cattle from Brazil.
机译：调查了巴西南部四个农场的三头小牛，一头腹泻的小牛和一头流产的胎儿的突然死亡。确定了两个与嗜血杆菌亲属相关的综合症：全身性组织细胞病（n = 4）和流产（n = 1）。主要病理发现包括血管炎，脑血栓性脑膜炎，坏死性心肌炎，肾梗塞，肝脓肿和支气管肺炎。用PCR测定法扩增绵羊疱疹病毒2，牛疱疹病毒1和-5，单核细胞增生性李斯特菌，猪流感嗜血杆菌和瘟病毒的特异性扩增子。在患有腹泻的犊牛中研究了牛A轮状病毒（BoRV-A）和牛冠状病毒（BCoV）。在所有流产胎儿的小牛和大脑的组织中均扩增了猪链球菌DNA，并伴有与组织细胞病一致的病理改变。其他所有PCR检测均为阴性;未鉴定出BoRV-A和BCoV。这些发现证实了H. somni参与了本研究中观察到的病理变化，并代表了巴西牛的组织病的首次描述。

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