In vitro adhesiveness of Gardnerella vaginalis strains in relation to the occurrence of clue cells in vaginal discharge.

G. vaginalis was isolated from 52.4 per cent patients with non-specific vaginitis. The haemagglutinating activity of G. vaginalis was strongest with human 'O' red cells and weaker reactions were observed with sheep and chick erythrocytes. Haemagglutinating activity of G. vaginalis with human 'O' cells (1:16 titre) could be correlated with clue cells in vaginal discharge in 73 per cent patients while in lower titres, this correlation was not observed.