The Influence of Some Inorganic Salts on the Sporulation of a Strain of Bacillus stearothermophilus

Sporulation of Bacillus stearothermophilus

“…Physiological studies of sporulation in the stenothermophilic bacteria have lagged behind those of the mesophiles for lack of a broth medium supporting abundant sporulation in the usual growth temperature range of Bacillus stearothermophilus (3). Thermophile spores are usually produced on an agar medium surface incubated 4 days to 2 weeks (1).…”

Symbiotic interrelationships of a pair of mesophilic and thermophilic bacilli

“…Studies involving growth requirements of thermophilic bacilli have suggested the fastidiousness of these organisms, including a definite methionine requirement (Baker _et al", 1960) and the necessity of nitrate ion in supporting sporula tion (Dahl, 1955). Many reports in the literature dealing with the effect of temperature on the growth requirements of microorganisms have shown that as the incubation temperature is increased there is an increase in the growth requirements of the particular organism under study.…”