The increase in white cell adhesion induced by pheromone occurs in five common media used in C. albicans research. White a/a cells of natural strain P37005 (A) and strain RBY717 (B), an a/a derivative of laboratory strain SC5314, were grown and tested with α-pheromone (α-ph) as described in the legend to Fig. 1, but the media in which they were tested included one of the following: supplemented Lee's (1), RPMI (5), SpiderM (3), YPD (3, 14), or SCD (3). The increases in adhesion induced by pheromone varied between >100-fold (in SCD) and >200-fold (in RPMI).