SUMMARYSulfanilamide is very fungistatic toTrichophyton mentagrophytes, T. rubrum, Epidermophyton floccosum, Microsporum canis, M. gypseumandSporotrichum schenckii, in vitro.Sulfanilamide has no definite fungistatic actionin vitrouponCandida albicans, C. krusei, C. tropicalis, C. parakrusei, C. pseudotropicalis, Cryptococcus neoformans, Monosporium apiospermum, Hormodendrum pedrosoi, H. compactumandPhialophora verrucosa.Sulfathiazole, sulfadiazine and sulfaguanidine are not appreciably fungistatic toward any of these organisms underin vitroconditions.