摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34405

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The degree to which histopathological lesions correlated with the numbers ofM. ovipneumoniaeand bacteria was studied in sixty 6 to 9 month-old lambs with chronic and subacute pneumonia slaughtered at a local meatworks. Large numbers ofM. ovipneumoniaewere associated with chronic proliferative changes such as peribronchiolar fibrosis and alveolar interstitial thickening. The combined effect of large numbers ofM. ovipneumoniaeand bacteria were associated with neutrophilic exudation and epithelial hyperplasia. However, lymphoid hyperplasia and excess mucus production were associated with low bacterial titres. There was no direct correlation between the numbers ofM. ovipneumoniaeand bacteria present in the pneumonic lungs.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34406

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Clinical and biochemical changes occurring in whole blood, urine, plasma and serum of sheep experimentally infected withLeptospira interrogansserotypepomonawere studied.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34407

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34408

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A myopathy associated with myotonia was observed in three related Chow Chow dogs. The clinical signs were first noticed at 2 to 3 months of age. They included muscle spasm and stiffness of gait which decreased in severity with exercise. Electromyographic findings and the demonstration of a muscle percussion dimple confirmed the presence of myotonia. Dystrophic changes were observed in muscle biopsies but histochemical techniques did not demonstrate fibre type changes. An inherited aetiology was suspected but not confirmed.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34409

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Records for over 28 000 cows in 316 herds serviced by the Bay of Plenty Livestock Improvement Association showed the average calving interval (CI) was 364 days (S.D. = ±31 days). Between-herd variation accounted for less than 1% of the total variation. The CI for cows conceiving to first insemination was 358 days compared to 367 days for conceptions to second inseminations, but the CI for this latter group of cows was significantly influenced by the interval between inseminations. When the between-service interval was 17 days or less the ensuing CI was 352 days, compared to 374 days for a between-service interval of 18 to 24 days. The results indicate that while the high incidence of short-return intervals to first insemination in New Zealand dairy cattle will reduce non-return rates, the factors producing these short-return intervals are not increasing CI's. The estimated intervals from calving to first service varied from 57 to 76 days.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34410

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34411

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34412

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34413

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor