Treponemal haemagglutination test.

ing the sheep erythocytes with those from the fowl and adjusting the technique to allow integration with the routine of the laboratory. After analysis of the results obtained on about 8,000 specimens, the test was introduced into the routine of the laboratory in June, 1969, and reported from July, 1969. This report is based on results obtained on 64,000 specimens received from July, 1969, to the end of March, 1970, supplemented by the experience of the test as a routine procedure on over 300,000 specimens. The direct comparison with the FTA-ABS test was carried out on 4,111 specimens selected from 84,000 consecutive requests received between October, 1971, and July, 1972.