Thermoactinomyces candidus, a New Species of Thermophilic Actinomycetes

Abstract

Thermoactinomyces candidus, a new species isolated from home environments and other sources, is reported. T. candidus differs from T. vulgaris in that the former species hydrolyzes esculin, splits arbutin, and does not attack tyrosine, hypoxanthine, or starch, whereas the latter does. T. candidus differs from T. sacchari by producing fast-growing colonies, abundant aerial mycelia, and hemolysis in blood agar, by decomposing esculin and arbutin, and by failing to hydrolyze starch. The type strain of T. candidus is T-106 (= ATCC 27868).