摘要:

The clinical course of Bovine Leukocyte Adhesion Deficiency (BLAD) in eight Holstein Friesian cattle is described. Affected animals were presented with a history of poor thriving and recurrent bacterial infections. Five of these animals had to be killed because of severe respiratory disease shortly after admittance. Three affected animals survived calfhood only as a result of frequent antibacterial treatments. At one year of age, failure to thrive and stunted growth were still evident, but infections requiring antibiotic treatments occurred only sporadically. Clinical manifestations of BLAD were found in the digestive system (gingivitis, periodontitis, alveolar periostitis, diarrhoea), the respiratory system and the skin (impaired wound healing, chronic dermatitis).

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694420

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The prevalence ofS. bovisin the intestinal tract of healthy racing pigeons was determined. Crop and cloaca swab samples obtained from 810 pigeons from 14 different lofts and from 122 pigeons that were presented for routine health control were examined for the presence ofS. bovis.Pooled faecal samples were also obtained from pigeons in 82 different pigeon lofts.S. boviswas isolated from crop or cloaca samples of approximately 40 % of pigeons of all ages by direct culture and from 80 % of the pooled faecal samples by enrichment culture.

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694421

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The concentrations of C‐reactive protein (CRP) in serum from dogs diagnosed as normal by clinical, haematological, and biochemical examination were determined by enzyme‐linked immunosorbent assay (ELISA) and slide reversed passive latex agglutination (RPLA), using IgG antibody isolated from rabbit anti‐canine CRP serum. The mean value of CRP in 66 normal dogs kept in private households was 8.4± 4.9 μg/ml by ELISA and 8.5± 6.3 μg/ml by RPLA. Thus, no significant difference was demonstrated between the values obtained by ELISA and RPLA. No significant age and sex‐related differences were found in the CRP values. The mean concentration of CRP in 84 6‐month‐old Beagle dogs kept in kennels by breeders was 6.2±3.9 μg/ml by ELISA and 8.0±4.0 μg/ml by RPLA. Again no significant difference was found. The CRP values determined by ELISA and RPLA were closely correlated (r=0.913). The serum and plasma concentrations of CRP measured by RPLA were also closely correlated (r=0.994). This indicates that plasma can be used as well as serum to determine CRP concentrations by RPLA.

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694422

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

A simple, mechanical method is described for the isolation of preantral follicles from bovine foetuses of 220–280 days of gestation. On average, 2918 + 621 (s.d.) preantral follicles were isolated per ovary. The isolated preantral follicles were characterized on the basis of the morphological appearance of the surrounding granulosa cells, the number of granulosa cell layers, and their diameter. The results show that primordial, primary, and secondary follicles differ morphologically and that they can be classified by their diameter.

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694423

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The productivity of trypanotolerant N'Dama cattle, kept under traditional management conditions in The Gambia, West Africa, was assessed by the regular, monthly collection of health and production parameters in two study areas. The study areas were selected because of differences in tsetse challenge. Performance traits were used to build up an index to estimate the productivity of village N'Dama cattle. The productivity index per 100 kg cow maintained per year varied from 37.2 kg in the study area of Keneba village (with a low tsetse challenge) to 21.4 kg for cattle kept near the villages of Tuba and Sambelkunda, an area which had a high tsetse challenge. Average age at first calving was 4.5 or 5.0 years depending on the study area, calving intervals were 623 or 703 days and there was an average 12% loss of body weight in adult females during the dry season. The productivity indices of village N'Dama cattle in The Gambia compare favourably with similar indices for trypanotolerant and trypanosusceptible breeds elsewhere in Africa, and show that even under harsh conditions and with high tsetse challenge, they are able to effectively produce milk and meat for the rural population.

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694424

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

A luminol‐enhanced chemiluminescence (CL) technique was developed for porcine pulmonary alveolar macro‐phages (PAM) and polymorphonuclear cells (PMN). PAM were obtained from lung washings of 3 week old gnotobiotic pigs. PMN were obtained from peripheral blood by separation on a discontinious Percoll gradient. Optimum CL signals were obtained with 105PAM/tube and 5X104PMN/tube. Stimulation indexes (SI) for PAM were approximately 10 for phorbol myristate acetate (PMA), 8 for opsonizedActinobacillus pleuropncumoniaeand 3 for opsonized zymosan. SI for PMN varied from 100 to 180 for complement opsonized zymosan, from 50 to 100 for opsonizedA. pleuropneumoniaeand from 10 to 20 for PMA. Formyl‐methionyl‐phenylalanine and calcium ionophore A23187 did not stimulate the oxidative activity of PAM or PMN. PAM that had been frozen and stored in liquid nitrogen reacted as freshly obtained PAM in the CL assay; however, PMN that had been frozen lost a great deal of their ability to produce oxygen radicals after thawing.

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694425

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

After intravenous (1 mg/kg body weight), intramuscular (1 mg/kg body weight) and oral (1 and 50 mg/kg body weight) administration of folic acid (FA) to pigs, plasma levels of FA, tetrahydrofolic acid (THF), 5‐methyltetra‐hydrofolic acid (5MF) were determined by using high‐performance liquid chromatography.

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694426

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

In early 1991, the Dutch pig industry was struck by Porcine Reproductive and Respiratory Syndrome (PRRS). Data from 91 breeding and/or farrow to finish herds that were positive for PRRS were used to investigate the impact of PRRS on productivity and to evaluate the relationship between PRRS and farm and management factors. The farms involved used the CBK management information system.

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694427

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

As no systematic study has been done to get an accurate estimate of the incidence of return to oestrus after first insemination in sows in the Netherlands, the objectives of this investigation were:

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694428

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

A review is given of the literature concerning the autonomic innervation of airway smooth muscle. The cholinergic, adrenergic and non‐cholinergic non‐adrenergic (NANC) systems in humans and several animal species are discussed. The diagnostic and therapeutic possibilities and limitations of new receptor specific agonists and antagonists are also discussed.

ISSN:0165-2176    

DOI:10.1080/01652176.1994.9694429

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor