Seven streptomycete strains were tested for biotransformation of salic
ylate. The products were identified by nuclear magnetic resonance spec
troscopy and three types of conversion were found. Streptomyces cinnam
onensis and Streptomyces spectabilis formed gentisate and salicylamide
concurrently. Streptomyces rimosus transformed salicylate to salicyla
mide. Streptomyces lividans, Streptomyces coelicolor, Streptomyces gri
seus and Streptomyces avermitilis produced only gentisate. Time course
studies of salicylate conversion by thin-layer chromatography and hig
h pressure liquid chromatography showed that salicylamide was accumula
ted in the culture broth, whereas gentisate was further metabolized.