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126 - 150 of 262
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30 mature Merino ewes in store condition (body condition score 2) were fattened on a maize grain/lucerne chaff diet or maintained in store condition (mean body weight difference, 11 kg). All sheep were then fed a maintenance diet of oat chaff. Following synchronization of all sheep with intravaginal...
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Runt white sturgeon (Acipenser transmontanus) develop during grow-out and are characterized by atrophied muscles and decreased growth. Our first objective was to compare the growth (and body condition) of previously-runt white sturgeon after they recovered from the runt state and sturgeon that had n...
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A parasite control programme was designed for > 1200 exotic ungulates maintained in mixed species enclosures at the San Diego Wild Animal Park. Three strategically-timed anthelmintic treatments were given during 1988-1989, and their success was measured by monitoring faecal egg counts before and aft...
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The objectives of this study were to evaluate the accuracy of the indirect fluorescent antibody test (IFAT) using serum and cerebrospinal fluid (CSF) of horses naturally and experimentally infected with Sarcocystis neurona, to assess the correlation between serum and CSF titres, and to determine the...
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We develop Bayesian models to estimate cluster-level test characteristics, sensitivity, specificity, prevalence, and predictive values, based on four different sampling schemes: a single test case and three sequential test cases. The corresponding cluster-level characteristics are calculated and com...
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Two strains of 27-wk-old commercial laying chickens (strain A, brown-egg-laying type and strain B, white-egg-laying type) were inoculated either orally (PO) or intravenously (IV) with a field isolate of Salmonella enteritidis phage type 4. Chickens were sequentially necropsied at regular intervals t...
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Objective: Sample Population: Procedure: Results: Conclusions and Clinical Relevance: To determine the distribution for limbs and bones in horses with fractures of the proximal sesamoid bones and relationships with findings on palmarodorsal radiographic images.Proximal sesamoid bones obtained from b...
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A pig farm of 6000 weaning to market age pigs had a mortality rate of 2.8% in October 1989 and 1.9% in April 1990. Four pigs were examined PM. All pigs had pulmonary haemorrahage with patchy necrosis and fibrinous pleuritis which was seen, on histological examiantion, as severe haemorrhagic and necr...
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The 10-point Milk and Dairy Beef Quality Assurance Program was developed collaboratively by the National Milk Producers Federation and the American Veterinary Medical Association and is designed to promote and document the responsible use of antibiotics in the dairy industry. One area of emphasis in...
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The report provided here contains a simplified set of diagnostic testing recommendations. These recommendations were developed on the basis of research funded by the USDA-Animal and Plant Health Inspection Service-Veterinary Services through a cooperative agreement. The report is intended to provide...
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The objective of this study was to establish reference hematologic and biochemistry values for adult riparian brush rabbits (Sylvilagus bachmani riparius). Between February 2002 and December 2003, complete blood cell counts and serum biochemistry panels were done on blood samples collected for 252 h...
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In this review, we critically discuss the objectives, methods and limitations of different approaches for the validation of diagnostic tests. We show (based on published data and our own experiences) that estimates for the diagnostic sensitivity and specificity may vary among populations and/or subp...
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The availability of accurate diagnostic tests is essential for the detection and control of Toxoplasma gondii infections in both definitive and intermediate hosts. Sensitivity, specificity and the area under the receiver-operating characteristic (ROC) curve are commonly used measures of test accurac...
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Nine of ten 13-month-old Aberdeen Angus bulls, injected with 0.25 ml of a sclerosing agent (3.6% formaldehyde in 90% ethanol) in the caudae epididymes, developed epididymitis after nine days. Semen samples collected after 40 days contained numerous motile spermatozoa in one sample, and small numbers...
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An international committee of Johne's disease (JD) researchers was convened to develop guidelines for JD challenge studies in multiple animal species. The intent was to develop and propose international standard guidelines for models based on animal species that would gain acceptance worldwide. Para...
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Objective - To estimate cat population size, management, and outside faecal deposition and evaluate attitudes of cat owners and nonowners to stray animal control, water pollution, and wildlife protection. Design - Cross-sectional survey. Sample Population - 294 adult residents of Cayucos, Los Osos, ...
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Objective: To validate a luciferase bioassay, which is based on a recombinant mouse hepatoma cell line, for the detection of exposure to petroleum in mustelid species. Animals: 122 American mink (Mustela vison) and 15 sea otters (Enhydra lutris). Procedures: Mink were exposed to Bunker C fuel oil or...
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Objective - To compare the results of regulatory screening and confirmation assays with those of high-performance liquid chromatography (HPLC) in the detection of ceftiofur metabolites in the tissues of culled dairy cattle. Animals - 17 lactating Holstein dairy cows. Procedure - Daily IM injections ...
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Serological responses to A. pleuropneumoniae serovar 7 infection were monitored by ELISA in a cohort of 66 pigs between weaning and market. Antibody concentrations were high (63/65 seropositive) at 4 weeks of age but declined to low levels from 8 to 12 weeks. Mean antibody concn rose significantly b...
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The authors evaluated existing list frames for disease surveillance by a telephone survey of 50 producers in Tulare county. No single ideal list frame existed, but the list frame of the Statistical Reporting Service, which included only 54% of the surveyed herds and 86% of the breeding swine within ...
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Strategies designed to minimize the probability of bluetongue virus (BTV) introduction to new areas should be based on a quantitative assessment of the probability of actually establishing the virus once it is introduced. The risk of introducing a new strain of bluetongue virus into a region depends...
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A retrospective longitudinal study was carried out of 25 male and 53 female Thoroughbreds that incurred catastrophic musculoskeletal injury (CMI) during racing which resulted in them being killed, and all California race entrants in 1992. PM examination records were reviewed, and race start informat...
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Herd size is frequently studied as a risk factor for swine diseases, yet the biological rationale for a reported association with herd size (whether positive or negative) is rarely adequately discussed in published epidemiological studies. Biologically plausible reasons for a positive association be...