Comparison of virus neutralisation and enzyme-linked immunosorbent assay for the identification of antibodies against vesicular stomatitis (Indiana 3) virus.

Bovine, equine and swine sera from areas free from vesicular stomatitis virus (VSV) Indiana 3 (IND3)--namely Argentina, Chile, Italy and Uruguay--and endemic areas (in Brazil) were examined for anti-VSV IND3 virus antibodies in order to compare results obtained using the virus neutralisation (VN) test and liquid-phase blocking enzyme-linked immunosorbent assay (ELISA). Statistical analysis of the data showed close agreement between the two techniques (K = 0.92). The ELISA gave a higher specificity, positive predictive value and efficiency than the VN test. The ELISA offers the additional advantage of using a non-infectious antigen and can therefore be used for antibody quantification in diagnostic laboratories in VSV-free areas to support epidemiological surveillance programmes.

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