Viruses and virus-like particles detected during examination of feces from calves and piglets with diarrhea   总被引：1，自引：1，他引：0       下载免费PDF全文

Durham PJ  Hassard LE  Norman GR  Yemen RL 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(11):876-881

A total of 763 fecal or intestinal samples from diarrheic calves and piglets were examined for viral content by immunofluorescence, electron microscopy or cell culture. Routine fluorescent antibody and cultural tests detected rotavirus (n=126), coronavirus (n=80) and bovine viral diarrhea virus (n=13). Electron microscopy detected rotaviruses (n=24) and coronaviruses (n=17) not identified by standard fluorescent antibody tests. Other viruses detected by electron microscopy included Breda virus-like particles (n=49), astroviruses (n=1), caliciviruses (n=1), rhabdoviruses (n=1), parvoviruses (n=2), enteroviruses (n=3), togavirus-like particles (n=2), and “chained” particles (n=5). Mixtures of several of the viruses were detected in a number of fecal samples.

The survey emphasized the value of electron microscopy as a broad-spectrum diagnostic tool.

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Association of weak estrual signs and irregular estrous cycles with hypothyroidism in a bitch          下载免费PDF全文

Peter AT  Gaines JD  Smith CL 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(12):957-958

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Outbreaks of budgerigar fledgling disease in three aviaries in Ontario          下载免费PDF全文

Gough JF 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(8):672-674

Outbreaks of budgerigar fledgling disease (BFD) occurred in three budgerigar aviaries in Ontario. Acute death in seven to ten-day-old nestlings and feather abnormalities in birds over three weeks of age were common findings. Ascites, hepatomegaly and hydropericardium were prominent gross lesions. Histologically, basophilic intranuclear inclusions were seen in many tissues. A severe drop in hatchability occurred in one aviary—a finding not previously reported with BFD. Interruption of breeding controlled the disease in aviary 1, but failed in two consecutive attempts in aviary 2. A third outbreak occurred in aviary 2 after depopulation and restocking. In aviary 3, the spread of disease was very rapid; 90% of the nestlings died within a few weeks. A papovavirus similar to a previously described isolate was recovered in this outbreak.  相似文献   

Bovine spongiform encephalopathy   总被引：1，自引：0，他引：1       下载免费PDF全文

Little PB  Thorsen J 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(9):712-714

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Alberta. Infectious pancreatic necrosis in hatchery fish          下载免费PDF全文

Hanson J  Larson B 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(9):759-760

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Epidural lymphosarcoma with myelomalacia in a seven-year-old Arabian gelding          下载免费PDF全文

Rousseaux CG  Doige CE  Tuddenham TJ 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(9):751-753

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Animal rights and wrongs: The vital role of a humane society          下载免费PDF全文

Ripley JJ 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(9):707-711

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Book review misleading          下载免费PDF全文

Croy BA  Summerlee AJ 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(10):777

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Canine congenital aortic stenosis: A review of the literature and commentary   总被引：2，自引：0，他引：2       下载免费PDF全文

O'grady MR  Holmberg DL  Miller CW  Cockshutt JR 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(10):811-815

Congenital aortic stenosis usually affects the subvalvular region, and occurs mainly in Newfoundland, Golden Retriever, German Shepherd, and Boxer dogs. The disorder is inherited as a dominant trait with variable penetrance in Newfoundland dogs.

The prevalence of subaortic stenosis-like heart murmurs in Golden Retriever dogs appears to be very much greater than previously suspected.

Most cases of aortic stenosis represent mild lesions, are detected as incidental findings, and result in no loss of longevity or quality of life. Moderate or severe stenosis may result in exertional weakness, syncope, or sudden death. Signs of congestive heart failure are rare unless mitral valve insufficiency is present.

Generally, electrocardiography and radiography are unrevealing in this disorder. Doppler echocardiography may be the best diagnostic tool to detect even mild cases of aortic stenosis.

At present, therapy is limited due to the technical expertise and expense required. The prognosis depends on the severity of the lesion.

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Alberta. Salmonella enteritidis from the udder of a cow          下载免费PDF全文

Wood J  Chalmers G  Fenton R  Pritchard J  Schoonderwoerd M 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(10):833

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