Streptomyces hygroscopicus ATCC 29253 produces rapamycin, elaiophylin and n
igericin. Although elaiophylin has no activity against Candida albicans ATC
C 11651, it markedly enhances rapamycin's antifungal activity. Nigericin ha
s only weak activity on its own but it also enhances rapamycin action. Surp
risingly, elaiophylin does not enhance nigericin activity on C. albicans.