[Growth of obligate-thermophilic bacteria on a medium with paraffin].

The obligate thermophilic bacteria Bacillus stearothermophilus (the optimal growth temperature 55-73 degrees C) and Thermus ruber (the optimal growth temperature 60 degrees C) were isolated from hot water springs of the Kunashir Island for the first time in a liquid mineral medium with paraffin. Some of the bacteria belonging to Bac. stearothermophilus grew at a high rate in a liquid medium with paraffin (strain 16); other strains (12a, 12b) were capable of growing only together with Thermus ruber; some strains could grow only on a solid medium with paraffin (strains 14a, 14b).