Amoebic meningoencephalitis in a young grey kangaroo (Macropus giganteus)     

JH NORTON  WJ HARTLEY 《Australian veterinary journal》1993,70(11):421-421

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Congenital spinal stenosis in beef calves in western Canada   总被引：1，自引：0，他引：1  

C E Doige  H G Townsend  E D Janzen  M McGowan 《Veterinary pathology》1990,27(1):16-25

Nineteen calves with a clinical history of posterior weakness or ataxia were examined at necropsy. Dorsoventral narrowing of the vertebral canal and myelopathy were found in the thoracic and lumbar areas of the spinal cord; vertebral metaphyseal growth plates had focal areas of premature closure. Malformation of the cranial base and hydrocephalus were also observed. Shortening of long bones and malformation of long bone epiphyses were prominent findings and were associated with focal premature closure of metaphyseal growth plates. The cause of these lesions is unknown; possible causes, including a maternal deficiency of manganese, are discussed.  相似文献   

Involvement of paramedical personnel in small animal practice.          下载免费PDF全文

E A Janzen 《The Canadian veterinary journal. La revue veterinaire canadienne》1974,15(12):352-353

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Saskatchewan. Trichomonas fetus in bulls in Saskatchewan   总被引：2，自引：1，他引：1       下载免费PDF全文

Campbell J  Schumann F  Janzen E  Wagner B  Polley L 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(9):571-572

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Clinical management of bovine respiratory disease          下载免费PDF全文

Janzen ED 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(4):215-218

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Equine Diagnostic Ultrasound     

WJ 《Journal of Equine Veterinary Science》1998,18(8):502

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Saskatchewan. Prevalence of Campylobacter jejuni in pronghorns and mule deer in southern Saskatchewan          下载免费PDF全文

Van Donkersgoed J  Janzen E  Chirino-Trejo M  Dunn C 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(4):302-303

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Prophylactic tilmicosin medication of feedlot calves at arrival   总被引：6，自引：4，他引：2       下载免费PDF全文

Schumann FJ  Janzen ED  McKinnon JJ 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(4):285-288

The parenteral administration of the antibiotic tilmicosin given on arrival at a feedlot was evaluated in a group of 304 steer calves. These calves were allotted to 24 pens so that there were 12 replicates of both the control and medicated groups. The treatment rate was reduced significantly during the first five days (p < 0.05) and during the first month (p < 0.01) of the feeding period in the medicated group. The average days from arrival until first treatment for respiratory disease was increased to 21 days in the medicated group compared to 9 days (p < 0.01) for the controls. The medicated group had improved average daily gain (p < 0.01) and feed efficiency (p < 0.01) over the trial period when compared to the nonmedicated animals.  相似文献   

Campylobacter jejuni abortions in two beef cattle herds in Saskatchewan   总被引：2，自引：0，他引：2       下载免费PDF全文

Van Donkersgoed J  Janzen ED  Chirino-Trejo M  Berry C  Clark EG  Haines DM 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(5):373-377

Abortions, accompanied by placental retention and weight loss, occurred during February and March in 19% of 120 and 10% of 108 beef cows and heifers on two neighboring ranches in southern Saskatchewan. A diagnosis of Campylobacter jejuni abortion was made based on lesions of necrotizing and suppurative placentitis and fetal bronchopneumonia in association with the culture of large numbers of C. jejuni from placentas and fetal tissues.

Campylobacter jejuni was isolated with variable frequency from fecal samples of aborting and healthy cows, and scouring and healthy calves. Campylobacter jejuni serotype 2 (Lior) was isolated from fetal tissues and feces of a scouring calf, whereas C. jejuni serotypes 1, 4, 5 and 99 were isolated from feces of in-contact cattle. We hypothesized that the source and mode of transmission of C. jejuni was fecal contamination of water supplies and feeding grounds by carrier cows or wildlife.

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The usefulness of pelvic area measurements as an on-farm test for predicting calving difficulty in beef heifers   总被引：1，自引：0，他引：1       下载免费PDF全文

Van Donkersgoed J  Ribble CS  Townsend HG  Janzen ED 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(3):190-193

Data collected from 197 replacement heifers in four beef cow herds in Saskatchewan were analyzed to determine the usefulness of pelvic area measurements as an on-farm test for predicting calving difficulty.

The prevalence of calving difficulty in these herds ranged from 15-34%. Pelvic area measurements prior to the breeding season and at the time of pregnancy examination had poor positive predictive values and sensitivities in each herd. These findings were consistent whether the measurement used as a cut-off point to distinguish between a large and a small pelvic area was the lower 25th percentile, the mean, or the common standard. Standard pelvic area and calf birth weight ratios were not useful in estimating deliverable calf birth weight.

Based on these results, pelvic area measurements prior to the breeding season and at the time of pregnancy examination are poor tests for predicting calving difficulty.

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