Canadian journal of comparative medicine and veterinary science最新文献_第5页

A survey of the alimentary tract of cattle for Clostridium perfringens. 牛消化道产气荚膜梭菌调查。

Canadian journal of comparative medicine and veterinary science Pub Date : 1967-10-01

H N Vance

{"title":"A survey of the alimentary tract of cattle for Clostridium perfringens.","authors":"H N Vance","doi":"","DOIUrl":"","url":null,"abstract":"Contents of the rumen, abomasum, ileum, and colon of 100 fattened cattle were examined for the presence of Cl. Perfringens. Liquid medium iniculated with each sample of gut content was tested for the presence of toxins of Cl. Perfringens. Identification of Cl. Perfringens was based on atmospheric requirements for growth, colonial morphology, and stormy fermentation in litmus milk. Identification of toxins was based on neutralization tests in guinea pigs and mice.Cl. Perfringens was isolated from 202 of 399 samples. In 105 additional cultures, colonies characteristic of Cl. Perfringens were present but could not be isolated in pure culture.Cl. Perfringens type D toxin was identified in only one culture, which was inoculated with ileum contents. Type A toxin was identified in eight of the 24 samples from the one lot of samples in which no type A antitoxin was used. There were no identifications of toxigenic types B, C, or E. The results indicate that an isolation from necropsy specimens of untyped Cl. Perfringens or type A Cl. Perfringens is in itself of little significance. The infrequency of occurrence of the other toxigenic types in this survey of healthy cattle indicates that recovery of these types from necropsy specimens may be of more significance in determining the cause of death.","PeriodicalId":72497,"journal":{"name":"Canadian journal of comparative medicine and veterinary science","volume":"31 10","pages":"260-4"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1494741/pdf/vetsci00011-0028.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15399391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of incubation temperature and serum content in agar overlay on plaque production by foot-and-mouth disease virus. 培养温度和琼脂覆盖层血清含量对口蹄疫病毒菌斑产生的影响。

Canadian journal of comparative medicine and veterinary science Pub Date : 1967-10-01

C H Campbell

引用次数: 0

The incidence and significance of bovine herpesvirus (infectious bovine rhinotracheitis) antibodies in the sera of aborting cattle. 流产牛血清中牛疱疹病毒(传染性牛鼻气管炎)抗体的发生率及意义。