[Passive hemagglutination assay (PHA) in detection of antibodies against measles]

By using passive hemagglutination test and hemagglutination inhibition test, 1771 specimens of sera from healthy people were simultaneously tested. The titers of antibodies against measles GMT were respectively 52.54 and 25.22. The related coefficient was 0.71. P less than 0.001. When the two methods were used to 77 children, the rate of active conversion was 97.40%. When the two methods were used to 28 patients suffering from measles, they gave out same results.