摘要:

Serum oestrone sulphate (E1S) and progesterone (P) levels were recorded from six red deer hinds throughout the first two-thirds of gestation. E1S was generally undetectable until 30 days post conception when levels rose, peaking between 60 and 80 days, and fell to lower values between 80 and 170 days post conception. P levels rose after conception and remained elevated for the remainder of the study.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35535

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Mean selenium and vitamin E (α-tocopherol) concentrations in the liver, myocardium and skeletal muscle of nine goat kids with nutritional myodegeneration (NMD) were significantly lower than those in a group of nine kids dying from other causes. Each of the 18 kids was from a different property in the southern half of the North Island. The polyunsaturated fatty acid composition of the liver, myocardium and skeletal muscle was not significantly different between the two groups, but the overall level of peroxidisable polyunsaturated fatty acids appeared high in both groups.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35536

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Reference curves demonstrating the relationship between serum or liver vitamin B12 and weight gain were derived from the examination of 16 published and 48 unpublished N.Z. trials. From these curves probability of obtaining an economic reponse (>10g/day body weight increase) for any serum or liver vitamin B12 can be determined. No significant (P<0.05) weight gain responses occurred to vitamin B12 or cobalt treatment in trials with mean serum vitamin B12 levels above 500 pmol/l or liver vitamin B12 levels greater than 500 nmol/kg. The reference curves were therefore derived from trials with vitamin B12 levels below these levels; 36 trials with serum vitamin B12 and 19 trials with liver vitamin B12 data. The mean vitamin B12 level at the mid point of the weight gain response period was selected from each trial.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35537

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A reovirus was isolated from a flock of 12,000 broiler chickens which experienced a total mortality of 6.3% up to 35 days. The reovirus produced large syncytia in primary chicken kidney cell cultures with eosinophilic intracytoplasmic inclusion body formation. Infected cells reacted with fluorescein conjugated specific anti-reovirus serum. Negatively strained virions had a double shelled appearance with overall diameter of 65 to 70 nm. The nucleic acid had ten discrete segments with electrophoretic mobilities as would be expected for a reovirus.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35538

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A study was undertaken to assess whether the persistent anthelmintic effect of ivermectin in cattle would allow an extension of the drenching interval in the currently recommended preventive drenching programme for the control of gastrointestinal nematode infection in dairy calves. A comparison was made of the parasitological and production responses of treatment groups of calves, grazing replicated plots, receiving either six drenches of oxfendazole at four-weekly intervals or four subcutaneous treatments with ivermectin at six-weekly intervals.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35539

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A total of 273 rectal swabs from dairy cows were cultured forCampylobacter jejuni/coli.The isolation rate was 17/72 (24%), 33/106 (31%) and 11/95 (12%) during summer, autumn and winter respectively. Approximately half of the isolates wereC.jejuniand the other halfC. coli.The isolates recovered from dairy cows were typed by bacterial restriction endonuclease DNA analysis (BRENDA) and compared with those of sheep. Seventeen different BRENDA patterns were produced by the isolates from dairy cows and six from 27 isolates of sheep. Of these 21 different BRENDA patterns only two were common to sheep and cattle.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35540

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A suction needle brain biopsy technique is a safe and effective method of obtaining cerebral cortex for experimental purposes in lambs. The biopsies are performed under general anaesthesia using halothane and oxygen following barbiturate induction. The method may have a number of related uses in this or other species.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35541

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Two experiments were carried out to investigate the acquisition by goats of resistance toHaemonchus contortus.In Experiment 1, five Saanen wethers reared worm-free and averaging 51/2 months of age at the start of the experiment, were dosed with 200H. contortusinfective larvae three times per week for 10 weeks (approximately 23 infective larvae/kg mean initial liveweight/week) and then given anthelmintic treatment. Each goat and an equal number of worm-free controls were then challenged with 10,000 infective larvae. Post mortem worm counts were carried out 30 days later. In Experiment 2, eight worm-free Saanen wethers, 14 months old at the start of the experiment, were dosed with 825 infective larvae per week for 14 weeks (approximately 23 infective larvae/kg mean initial liveweight/week) except for one week when only 300 larvae were given and one week when no larvae were given. After anthelmintic treatment, each received, together with seven worm-free control animals, a challenge dose of 15,000 infective larvae. Post-mortem worm counts were carried out 28 days later. There were no significant dii- ferences in post-mortem worm counts between previously infected and uninfected groups in either experiment. In both experiments, serum pepsinogen values rose significantly as a result of infection but there was no significant (p>0.5) correlation between worm counts and pepsinogen values on the day of slaughter.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35542

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

The purpose of the present study was to examine ovulation rates and embryo numbers and quality in goats of feral origin following treatment with either Folltropin (Vetrepharm Inc., Ontario, Canada) or Ovagen (Immnno-Chemical Products Ltd., Auckland).

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35543

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A 3 year old Boxer dog was presented with a history of syncope and an irregular heart heat. An arrhythmia characterised by ventricular premature contractions was detected and was thought to cause the syncopal episodes. On the basis of the age, breed and the characteristic electrocardiographic findings, a diagnosis of Boxer Cardiomyopathy was made. The dog was treated with procainamide 500 mg every 8 hours to control the arrythmia and there were no further syncopal episodes in the subsequent 13 months.

ISSN:0048-0169    

DOI:10.1080/00480169.1989.35544

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor