摘要:

The histamine contents of a range of North American commercial pet foods and pet food ingredients were determined by a spectrofluorometric technique. The change in histamine content of open cans of pet food stored in a refrigerator or at room temperature was also investigated. The histamine content of the pet foods examined ranged from a low of 0.16 𝛍g/g in a liquid critical care diet to a high of 65.5 𝛍g/g in a canned fish diet. The amount of histamine in the foods tested was insufficient to cause histamine toxicosis but it cannot be excluded that some of the foods contained sufficient histamine to cause idiosyncratic reactions in histamine-sensitive cats. Storage of opened cans of pet food, either under refrigeration or at room temperature, did not significantly increase the histamine content of most pet foods.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35823

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

In each of two dairy herds (A and B), rising yearling heifers (Trial 1) and adult cows (Trial 2) were assigned to three treatment groups. Untreated animals were compared to animals treated with either two or four intra-ruminal pellets containing 3 g of elemental selenium. The administration of pellets at the recommended dose (two pellets per animal) was effective in elevating whole blood glutathione peroxidase activity and selenium concentration to over 10 times those of control animals.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35824

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Analysis of disease and defect data from a national meat inspection database for very young calves slaughtered in New Zealand up to 1987 revealed low prevalences of diseases and defects but relatively high condemnation rates within particular disease and defect categories. Calves slaughtered between 1987 and 1992 showed a decrease in the total condemnation rate of carcasses from 2.20% to 1.17%. The greatest reductions in condemnation rates were seen in the categories of wounds and bruises and “other” reasons; navel ill (omphalophlebitis) was initially included in the latter category and condemnations due to this condition persisted as the most frequent cause of wastage. The decrease in condemnation rates occurred subsequent to implementation of a national farm-gate quality assurance programme and a scientific investigation of traditional meat inspection carcass condemnation criteria. The former led to an increase in the quality of calves submitted for slaughter and the latter to changes in specifications for meat inspection judgments for several localised and resolved diseases and defects. Alterations to the disease and defect recording categories of the database have resulted in more appropriate national statistics and such a database can be used to identify inconsistencies in the application of meat insDection iudgments between slaughterhouses.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35825

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Ten parasite-free 6-month-old lambs were drenched on days 0 and 28 with fenbendazole and 1 day after each drench were injected with human erythrocytes and ovalbumin. Ten other lambs injected with the antigens were not drenched with anthelmintic and served as controls. Lymphocytes from the fenbendazole-drenched lambs collected 3 days after the first antigen injections and culturedin vitroin RPM11640 plus 5% foetal calf serum, and lymphocytes collected at 3 and 7 days and cultured in RPM1 plus 50% autologous serum, had decreased blastogenic activity compared with lymphocytes from control lambs. Similiarly, decreased blastogenesis was observed with lymphocytes collected 7 days after the second antigen injections from drenched lambs and cultured in 50% autologous serum containing concanavalin A. In contrast, increased blastogenesis was seen with lymphocytes collected 14 days after the second antigen injections from the drenched lambs and cultured in 50% autologous serum containing phytohaemagglutinin. Similar antibody responses were seen for the drenched and control lambs in response to the injections of both antigens except that, after the second injection, there was a significant reduction in antibody response to human erythrocytes in the fenbendazole-treated lambs. Decreased serum complement levels were seen particularly 3 and 7 days after the second antigen injections in drenched lambs. These serum samples had increased conglutinin activity. At the end of the experiment, the fenbendazole-drenched lambs were significantly heavier than the control lambs. However, this did not appear to be related to any effects of fenbendazole on levels of growth promoting hormones.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35826

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The aim of this study was to investigate the prevalence of wobbler disease within a Dobermann pinscher population from three geographical locations in New Zealand. The study population consisted of 138 adults (aged 1–13 years) and 32 puppies (aged 6 weeks to 11 months). Data collected for each dog included age, sex, geographic location, if a choker chain was used or not and, in adults, the following body measurements: dimensions of head length, head circumference, width between shoulders, neck length, height at withers and withers to rump length. In addition, lateral radiographs were taken of the caudal cervical vertebrae of each dog and the radiological abnormalities associated with wobbler disease scored, so that each dog could be assigned to one of three radiological groupings. Based upon a neurological examination, each animal was also placed into one of three neurological groupings. The relationship between radiological and neurological groupings and the independent variables was initially compared using a univariate and subsequently a multivariate analysis.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35827

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Rickets was diagnosed in two weaner alpacas from a flock showing ill thrift and lameness during the winter of 1992. Both animals had abnormally shaped ribs with occasional healing fractures, irregular thickening of growth plates and metaphyseal haemorrhages. The mean serum phosphorus concentrations of the alpacas fell during June and July, even though lambs grazing the same pasture had normal serum phosphorus concentrations and the phosphorus concentration of the pasture was considered adequate. Vitamin D deficiency may also have contributed to the osteodystrophy. The alpacas had a thick fleece during the winter, and diurnal Vitamin D3, synthesis resulting from solar irradiation is likely to have been minimal, especially considering the reduced sunshine hours recorded during the 1992 winter. Surviving alpacas recovered after treatment with monosodium phosphate and an oral Vitamin D supplement. It is possible alpacas are more susceptible to deficiencies of phosphorus and Vitamin D than other grazing animals in New Zealand.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35828

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Papillomavirus was identified in two fibromatous dermal nodules which were representative of those present in the caudal fold skin of the tail in 25 of 145 beef cattle tuberculin tested 3 months earlier. Bovine warts were endemic on the property and it is hypothesised that the papilloma virus was introduced intradermally by a virus-contaminated tuberculin syringe. At palpation, the well-circumscribed hard nodular lesions were atypical of the diffuse caudal fold swelling usually present in reactions to tuberculin. Provided tuberculin testing officers are aware of the risk of fibroma and papilloma induction by transmission of papillomavirus, and they are careful to prevent equipment coming into contact with warts at time of inoculation, this source of inaccuracv mav be avoided.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35829

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The ceroid-lipofuscinoses comprise a group of inherited storage diseases of human beings and animals that are characterised by progressive neurodegenerative disease and the accumulation within cells of a fluorescent lipopigment. A distinct syndrome occurs in Cocker spaniel dogs in which there is a generalised accumulation of a lipofuscin-like pigment, with such a heavy accumulation in smooth muscle that the intestine and other organs have a brown discolouration. Such discolouration is not observed in other forms of ceroid-lipofuscinosis. Dogs are clinically affected in adulthood and show progressive hind limb paresis, into-ordination, and deficient postural reactions and proprioception. Spinal reflexes may be exaggerated. Behavioural or temperament changes, seizures or blindness may occur.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35830

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor