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At least 37 records · Page 2Linked to original sources
PubMed2000

Enzyme-linked immunosorbent assay for the diagnosis of bovine leukosis: comparison with the agar gel immunodiffusion test approved by the Canadian Food Inspection Agency.

Four commercially available bovine leukemia virus (BLV)-ELISA kits from Europe or the United States were compared to the agar gel immunodiffusion (AGID) test officially approved by the Canadian Food Inspection Agency (CFIA). A total of 1200 cattle serum samples were used. Three ELISA kits based on the envelope glycoprotein (gp51) gave an excellent correlation with the AGID test. The kappa values were 0.998, 0.984, and 0.986 for the ELISA kits #1, #2, and #3, respectively. The ELISA kit based on the p24 core protein was found to be less sensitive than the officially approved AGID test and detected 5.13% of false negatives. Forty BLV AGID strongly positive serum samples were diluted. Based on the dilution experiment, the gp51 ELISA kits were found to be more sensitive than the AGID test kits. They were capable of detecting antibodies in samples diluted up to 1/5000 (kit #1), 1/20 800 (kit #2) and 1/4000 (kit #3), whereas the AGID kit was only capable of detecting antibodies in samples diluted up to 1/100. Based on these observations, the gp51 BLV-ELISA was recognized as an official test method for the serodiagnosis of bovine leukosis in Canada.

Agar↗
PubMed2002

An evaluation of the risk assessment method used by Environmental Health Officers when inspecting food businesses.

Two outbreaks of infection with Salmonella enteritidis phage types 5c and 6a occurred in a number of Scottish health board areas between May 2000 and January 2001. A case-control study of food businesses was subsequently carried out to ascertain whether the scores derived from Environmental Health Officers' inspections prior to the outbreaks differed between food businesses where outbreak cases had eaten in the week before the onset of their illness (case food businesses) and neighbouring food businesses at which no outbreak case had eaten (control food businesses). The study showed no significant difference between the scores of case and control food businesses. The results suggest that the inspections were ineffective in identifying those food businesses that are more likely to cause incidents of food poisoning.

Case-Control Studies↗