猪伪狂犬病与细小病毒病混合感染的诊治报告

本文报告了一起猪伪狂犬病和细小病毒病混合感染的诊治病例。该场出现母猪产死胎、木乃伊胎、流产、死产和初生仔猪发病死亡现象，用疫苗预防和中西药结合治疗等综合防治措施取得了较好的疗效。     

犊牛轮状病毒和大肠杆菌混合感染检测

黑龙江省某规模化奶牛场部分新生犊牛发生了严重腹泻且犊牛病死率较高。为了确诊,无菌采集病料,通过病毒检测、细菌分离、生化试验、细菌和病毒特异性基因PCR扩增、动物致病性试验及药敏试验等方法进行了病毒抗原和微生物检测。结果显示,病毒检测中牛轮状病毒（BRV）呈阳性,PCR扩增得到400 bp的特异性片段;从病料中分离到1株含K99和F41兼性菌毛抗原的高致病性产肠毒素大肠杆菌（ETEC）,该分离菌株对恩诺沙星、头孢唑啉、氯霉素敏感,对其他抗生素有一定的耐药性。流行情况调查结合病原学检查确诊该牛场新生犊牛严重腹泻是由BRV和大肠杆菌混合感染造成的,根据诊断结果进行了针对性地防制,取得了良好的防控效果。     

The Test of Polyinfection of Bovine Rotavirus and Escherichia coli

Newborn calves in a dairy farms suffered from severe diarrhea disease with high mortality in Heilongjiang province.In order to make a definite diagnosis,the pathological samples were collected aseptically and the viral antigens and microorganism were detected by virus detection,bacteria separation,biochemical test,PCR for the specific gene of virus and bacteria,animal pathogenicity test and antimicrobial susceptibility test. The results showed that the virus detection of bovine rotavirus was positive and specific gene fragment of bovine rotavirus was amplified. One E. coli strain with K99 and F41 adhesin antigens which belonged to highly pathogenic enterotoxigenic E. coli was isolated. This strain was sensitive to enrofloxacin,cefamedin and chloramphenicol,however,it showed resistance for other antibiotics. A polyinfection of bovine rotavirus and E. coli were eventually confirmed through epidemic investigation and pathological diagnosis. It had significant preventive effect by taking effective measures according to the diagnosis results.