ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693751

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

A largeBabesiaspecies occurs in sheep on the North Sea islands of the Netherlands. The tickHaemaphysalis punctatais a vector. Its pathogenicity appears to be low. It is morphologically similar to a Turkish strain, considered to beB. motasi,which is also transmitted byHaemaphysalisticks. It differs from the Turkish parasite serologically as well as in cross‐immunity tests and in not being effective to goats.

ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693752

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Seventy‐three flocks of fowl were tested at regular intervals for the presence of precipitins to fowl adenovirus (AV) and infectious bronchitis virus (IBV), haem‐agglutinating inhibiting antibodies to BC14 virus, and of agglutinins toMycoplasma gallisepticum(M.g.) andMycoplasma synoviae(M.s.). In all the eight flocks affected with Egg Drop Syndrome (EDS ‘76), egg production problems were associated with increasing numbers of BCI4 virus reactors and AV reactors. In flocks showing production problems other than EDS ‘76 without any apparent cause, the average percentage of AV reactors increased significantly after the rearing period; this was not true of IBV reactors. BC14 reactors were either absent or present only once, in small numbers and with low titres, during the test period. The average percentage of AV reactors did not increase after the rearing period either in normally producing flocks or in flocks with production problems for which other diseases or dietary errors plausibly accounted for these problems. All this suggests a pathogenic role of AV in production problems. One can conclude from the high percentage of reactors in all groups of flocks that sub‐clinical IBV infections are common.

ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693753

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

The cervical lymph nodes of pigs, the retropharyngeal and submandibular lymph nodes of cattle and faecal samples from both animal species were examined for the presence ofCorynebacterium equi.The organism was recovered from 19 (35 per cent) of 54 porcine cervical lymph nodes and from 0 of 54 bovine retropharyngeal and submandibular lymph nodes. Fifteen (50 per cent) of 30 bovine faecal and 11 (35 per cent) of 31 porcine faecal samples yieldedC. equi.

ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693754

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

The severity and extent of osteochondral lesions have been examined, macroscopically, radiographically as well as histopathologically, in six different breeds of pigs (Belgian Landrace (B), Duroc (D), Dutch Landrace (N), Dutch Yorkshire (G), Hampshire (H) and Piétrain (P)). In these pigs three different levels of feeding were used.

ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693755

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Coefficients of correlation have been calculated between morphological lesion scores of osteochondrosis that were made on the bones of porcine fore and hind limbs and some carcass characteristics. It was found that carcass length, as well as the relative weights of the hams were significantly correlated with the lesions that were observed in the proximal site of the femur and the medial femoral condyle. Despite these significant correlations, the values of the correlation coefficients were too small to be of any use for selection purposes. This applies the whole animal population, consisting of 6 breeds of pigs. It is shown that the coefficients of correlation between the morphological lesion scores of the femur and the relative weights of the hams in some of the individual breeds were much higher, implying a possibility for the prediction of osteochondrosis based on carcass characteristics.

ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693756

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Four live virus vaccines against Infectious Bursal Disease (IBD) were studied with regard to their safety, immune response and applicability. None of the vaccines caused clinical symptoms or had an adverse impact on bodyweight. Differences between these vaccins were observed in their effect on the Bursa/ Bodyweight Ratio and the severity of the microscopical lesions of the bursa Fabricii. The immunosuppressive effect of IBD vaccination at one day of age on the response to Newcastle disease vaccine applied was rather low.

ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693757

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Congenital bicuspid stenosis with left ventricular hypoplasia was diagnosed in a kitten. Clinical weakness, dyspnoea and marked cardiomegaly (X rays) were related to postmortem findings. The cardiomegaly had resulted from an enlargement of the left auricular appendage. It is supposed the cardiomegaly developed after the closing of the foramen ovale.

ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693758

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0165-2176    

DOI:10.1080/01652176.1980.9693750

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor