Résultats de la recherche - 685 results
Salmonella on pig carcasses: positive pigs and cross contamination in the slaughterhouse36717
contamination and the status of the delivered animals (P=0.01675). Cross contamination was estimated to account for 29% of the positive carcasses. The slaughterhouse environment was highly contaminated; before ...
Estimation of the minimum detectable value for the determination of PCBs in fatty food samples by GC-ECD: a curvilinear calibration case
p.413- 418 (2003) Keywords: alternatives at Calibration Case estimation food Impact IS method methods MODEL models ON PCB Pcbs RANGE regression Regression model result results Sample Samples Yield ...
Prevalence of human erythrovirus B19 DNA in healthy Belgian blood donors and correlation with specific antibodies against structural and non-structural viral proteins.
plasma-pool screening and exclusion of highly viraemic donations are recommended. The objectives of this study were to estimate the prevalence of B19 DNA in our blood-donor population, to determine the ...
Metaanalysis of the accuracy of rapid prescreening relative to full screening of pap smears.
The pooled specificity was estimated at 96.8% (CI 95.8-97.8%). The sensitivity increased significantly with duration of screening and decreased with workload. Almost 3% of all abnormal slides were ...
Transmission of encephalomyocarditis virus (EMCV) among pigs experimentally quantified.
transmission experiments were performed to estimate the basic reproduction ratio R(0), indicating the level of encephalomyocarditis virus (EMCV) transmission among pigs. In a first experimental set-up with nine ...
Classical swine fever (CSF) marker vaccine. Trial II. Challenge study in pregnant sows.
more potent as the estimated probability of fetal infections was lower. Nevertheless the risk of virus spreading after vaccination via transplacental transmission is still present and has to be addressed ...
An E2 sub-unit marker vaccine does not prevent horizontal or vertical transmission of classical swine fever virus.
the definition of the infectious period, two different estimates of R0 were calculated (R0 =14.8 and 3.3), both significantly larger than 1 (P <0.01). In three out of the eight vaccinated pregnant ...
An experimental infection with classical swine fever virus in pregnant sows: transmission of the virus, course of the disease, antibody response and effect on gestation.
the martingale estimate of R0 (13.0) it was concluded that the two experimentally inoculated gilts infected all contact gilts, although random contacts between gilts were not possible. The prescence of ...
A PCR test to identify bacillus subtilis and closely related species and its application to the monitoring of wastewater biotreatment.
extracts had poor sensitivity. When assayed on cell suspensions derived from enriched wastewater samples, sensitivity was increased. Using a simple calibration method, it was possible to estimate the ...
Epidemiological support for a multifactorial aetiology of Kashin-Beck disease in Tibet36703
estimate the impact of each factor. The following variables were independently associated with the disease: age, gender, low socio-economic status, indicators of a poorly diversified diet, iodine deficiency ...