[Variants of the agglutination reaction: the present and future]

The methodological analysis of the main problems of serological diagnosis has made it possible to pick out the tests of the agglutination type, especially those made with the use of sensitized erythrocytes, as most suitable for mass use. The comparison made between different agglutination tests has confirmed the fact that the use of sensitized erythrocytes in such tests is highly effective. The comparison of the diagnostic possibilities of agglutination tests involving the use of erythrocytic reagents with those offered by enzyme immunoassays has demonstrated that tests based on the phenomenon of passive hemagglutination have great possibilities and hold considerable promise not only for mass immunological surveys, but also for research work.