摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34414

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34415

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Fifty-eight faeces samples from calves and yearling cattle with diarrhoea were subject to a virus cultural study in monkey kidney cells and bovine embryonic kidney and lung cells. The properties of the 6 viruses isolated indicated that 5 were bovine enteroviruses belonging to 2 biologically different groups, and the remaining virus was probably a rotavirus (reo-like virus).

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34416

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The prevalence of precipitating antibodies to avian adenoviruses in 1431 diagnostic serums originating from poultry farms in the northern half of the North Island was 34.7%. Precipitating antibodies were first detected in birds 8 weeks of age and the prevalence increased steadily with age until the birds were 12 months old. The majority of poultry farms (74%)had serological evidence of the presence of AAV.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34417

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34418

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The mating and lambing records for 1964–1972 of a Romney stud that had been experiencing a serious dystocia problem were investigated. Until 1970 between 20 and 31% of ewes required assistance at lambing but this level then fell to 18% in 1971, 11% in 1972, 3.3% in 1973 and 4.0% in 1974. The decline in dystocia evident in the latter years of the investigation is considered to have been brought about largely by the culling of ewes that were repeatedly assisted at parturition and by the selection of rams that sired lambs of lower birth weight.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34419

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A disease outbreak occurred in broiler flocks which exhibited the signs and lesions typical of infectious anaemia and gangrenous dermatitis.Staphylococcus aureuswas isolated from the skin lesions. Attempts to isolate virus in embryonated eggs were unsuccessful. The treatment with antibiotics did not alter the course of the disease but there was less mortality in erythromycin-treated groups.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34420

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34422

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor