[serological surveillance of west nile virus infection in a village of the central highlands in madagascar].a serological survey on the frequency of west nile virus antibodies has been carried out in a village near antananarivo. igg antibodies were searched for by enzyme-linked immunosorbent assay on 460 sera collected in december 1988 and on 494 sera collected in july 1989. the prevalence of west nile virus antibodies varied from 13.4% to 21.8% between the beginning and the end of the rainy season. seroconversion was observed in 14.7% of 354 paired serum samples collected in december and july which h ...19902369170
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