山东省山羊猝死症病因病性研究

采用流行病学调查、毒物检测及微生物学检验等方法，对山羊猝死症的病因病性进行了系统研究。结果证明，本病是由病原菌所致。致病菌为革兰氏阳性杆菌和革兰氏阴性杆菌，经过对这两种菌进行了生化反应等生物学特性研究后，分别鉴定为凝结芽胞杆菌和肺炎克雷伯氏杆菌亚种。实验证明，这两种菌通过协同作用而使山羊发生猝死症。     

A MUCOSAL DISEASE VIRUS AS A CAUSE OF ABORTION HAIRY BIRTH COAT AND UNTHRIFTINESS IN SHEEP

A condition resembling border disease has been transmitted by the inoculation of pregnant ewes with material from affected lambs. Forty-nine merino ewes, mated to merino rams 7 to 87 days previously, were inoculated with an homogenate of brain, spinal cord and spleen from affected lambs. Mummified foetuses, abortions and stillbirths were observed, and lambs with hairy birth coats were born to ewes inoculated between days 12 to 70 of gestation. A mucosal disease virus (MDV), present in the original material, was recovered from the aborted foetuses and lambs. Attempts to induce passive protection using bovine anti-serum to the C24V strain of MDV were not successful. The condition was also transmitted by inoculation of pregnant ewes with a cell culture supernatant prepared from tissue cultures that had been inoculated with an organ homogenate pool. MDV was present in the supernatant and was recovered from aborted foetuses and lambs. It is suggested that a condition in sheep in Australia resembling border disease is due to the infection of the pregnant ewe by a mucosal disease virus.     

黄花棘豆对山羊的毒性研究

本试验从瘤胃瘘管每天给5只山羊投服黄花棘豆粉末(10g/kgB·W),以研究该草对山羊的毒性。试验羊在18～22天开始出现神经症状,表现为精神沉郁,目光呆滞,反应迟纯,喜卧,四肢无力,后肢麻痹,少尿等;在33～65天内死亡。实验室检查发现,肝功明显变化,GOT活性,黄疸指数明显升高,血浆α-甘露糖苷酶活性降低,血液高铁血红蛋白含量及全血谷胱甘肽过氧化物酶活性无明显变化,尿低聚糖含量升高,在浓缩尿中可检出生物碱。主要病理组织学变化为小脑蒲肯野氏细胞,胰腺泡细胞空泡变性;肝细胞,心肌细胞及肾小管上皮细胞颗粒变性。试验结果排除了黄花棘豆中毒是由硒和脂肪族硝基化合物引起的可能性,同时证明了黄花棘豆中毒的毒素是吲哚兹定生物碱,该生物碱对α-甘露糖苷酶的抑制作用是中毒的主要环节。     

弓形虫病诊断方法研究进展

弓形虫病是一种分布广泛、危害严重的人兽共患病。因此建立快速、准确、特异的弓形虫病诊断方法尤为重要,本文就该病的诊断方法研究进展加以简要概述。