Detection of Salmonella-containing food using the 1-2 test     

A Weber  E Rackelmann 《Berliner und Münchener tier?rztliche Wochenschrift》1991,104(7):233-235

133 samples of food were investigated for comparison of a recent commercially available 1-2 test (Biocontrol) with a cultural standard method (non-selective pre-enrichment in buffered peptone water, selective enrichment in Rappaport-Vassiliadis-medium and selenite brilliant-green mannitol enrichment broth, inoculation on two selective agars) for presence of Salmonella. The 1-2 test showed in positive results an accuracy ("sensitivity") of 94.7% and in negative results an assurance ("specificity") of 97.9% and is therefore considered suitable for detection of Salmonella contaminated food.  相似文献   

Age and exercise effects on mitochondrial density and capillary fibre ratio in bird leg muscle     

J H Brackenbury  S A Holloway 《British poultry science》1991,32(3):645-653

1. Muscle fibre composition, capillary-fibre ratio and mitochondrial density of the Iliotibialis lateralis muscle were monitored during growth from the age of 8 weeks to sexual maturity (24 weeks) in sedentary birds and in birds subjected to regular treadmill exercise. 2. The Iliotibialis lateralis muscle consists almost exclusively of type IIA and IIB fibres with a small percentage of "unclassified" fibres. Over the 16-week period of growth there was no change in fibre composition but a marked fibre hypertrophy linked with a fall in the capillary-fibre ratio. Mitochondrial volume density increased with age but this was not significant. 3. Exercise significantly increased the IIA:IIB fibres ratio from 0.77 to 1.1 but had no significant effect on any other measured characteristics. 4. It is concluded that exercise at the intensity and duration employed (10-15 min daily, ca. 70-80% maximum oxygen consumption) has little effect on the growth and development of avian skeletal muscle although there was evidence of an increased oxidative capacity of the muscle.  相似文献   

Maxillary fibrous dysplasia in a yearling filly   总被引：1，自引：1，他引：0       下载免费PDF全文

Field JR  Horney FD 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(1):40-41

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Ontario. Meningoencephalitis associated with bacterial kidney disease in salmonids   总被引：1，自引：1，他引：0       下载免费PDF全文

Speare DJ  Ostland VE  Ferguson HW 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(2):117

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Efficacy of parenteral antibiotics for disease prophylaxis in feedlot calves   总被引：9，自引：9，他引：0       下载免费PDF全文

Harland RJ  Jim GK  Guichon PT  Townsend HG  Janzen ED 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(3):163-168

Trimethoprim-sulfadoxine (TMPSDX) and two formulations of oxytetracycline (OTC) were examined for their prophylactic efficacy in feedlot calves when given by intramuscular injection on arrival at a large commercial feedlot. The study included 2,112 high-risk feeder calves that developed disease early in the feeding period. Both formulations of OTC reduced bovine respiratory disease morbidity during the first two weeks on feed and for the entire feeding period by 15-19% (p<0.05), and they also reduced all fatal fibrinous pneumonia by 67% and 84% (p<0.05). All three drugs significantly reduced all fatal disease in animals first treated during the second week on feed, but not for the overall feeding period. Oxytetracycline with 2-pyrrolidone reduced the incidence of all fatal disease by 44% (p<0.05) during the entire feeding period. The case fatality risk for calves first treated during the second week on feed was lower (p<0.05) in the TMPSDX group and in the OTC with polyvinyl-pyrrolidone group.  相似文献   

Angiostrongylosis with disseminated larval infection associated with signs of ocular and nervous disease in an imported dog   总被引：2，自引：1，他引：1       下载免费PDF全文

Perry AW  Hertling R  Kennedy MJ 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(7):430-431

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"Benchmark" - a large observational study of Ontario beef breeding herds: Study design and collection of data          下载免费PDF全文

McDermott JJ  Alves DM  Anderson NG  Martin SW 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(7):407-412

The methods used in a large field study which investigated the health and productivity of Ontario beef breeding herds are described. Beginning in the calving season of 1986, 180 breeding herds on 170 randomly sampled farms were followed for a two year period, using producer records and annual farm visits.

The response (cooperation) rate among the eligible producers initially contacted was 70%. Approximately two-thirds of producers maintained individual animal records, primarily calving season records. Approximately 40% recorded disease occurrences.

The advantages, disadvantages, and interpretation of “on-farm” observational studies are discussed.

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Prince edward island. Scrapie in prince edward island          下载免费PDF全文

Bildfell R  Brocklebank J  Doherty T  Bellamy C 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(7):438

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More on sexism          下载免费PDF全文

Crook A 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(7):389

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Microbiological reference values for foods: a European perspective   总被引：2，自引：0，他引：2  

D A Mossel  P Van Netten 《Journal of the Association of Official Analytical Chemists》1991,74(2):420-432

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