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An enzyme linked immunosorbent assay elisa for the detection of antibodies to bovine viral diarrhea virus in cattle sera



An enzyme linked immunosorbent assay elisa for the detection of antibodies to bovine viral diarrhea virus in cattle sera



Veterinary Microbiology 10(4): 359-370



A microtiter ELISA has been established for the quantitation of antibodies to bovine viral diarrhea virus (BVDV). Single dilutions of sera were assayed and units of antibody were calculated from a standard curve. In order to detect the maximum number of responding animals both IgG1 and IgG2 antibody should be assayed, although detection of IgG1 alone was nearly as effective. The ELISA was as sensitive as the virus neutralization test for detection of antibody; comparison of an ELISA that detected IgG1 plus IgG2 antibody to BVDV with the virus neutralization test gave a correlation coefficient (r) of 0.89 (P < 0.001 for 95 compared sera). Although similar amounts of IgG1 and IgG2 antibodies were present in sera from both experimentally- and naturally-infected cattle, antibody to BVDV in colostrum and in the sera from young calves was predominantly IgG1. The number of adult cows with antibody was 40 out of 41, while 36 of 44 calves reared in a beef unit were found to have produced antibody by the time they were 31.5 wk old, an indication of the high prevalence of BVDV in the cattle population.

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Accession: 004723283

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