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  • Title: [Growth and development of extreme-thermophilic bacteria at 70 degrees].
    Author: Egorova LA.
    Journal: Mikrobiologiia; 1975; 44(1):141-6. PubMed ID: 1160629.
    Abstract:
    Nine cultures of non-sporeforming gram-negative extreme-thermophilic bacterium Thermus flavus have been isolated from hot springs of Kamchatka. Their optimal growth temperature on a solid potato medium was 70 to 76 degrees C, and on a liquid medium (20 per cent potato broth containing 0.5 per cent peptone and 0.1 per cent yeast extract) 70 degrees C. The minimum time of generation of the bacterium, strain 71, growing on the liquid medium at 70 degrees C, was 52 minutes. Other extreme-thermophilic cultures differ from the strain 71 by a lower growth rate. The maximum biomass yield was 1.96 g per litre of the medium after 6 to 9 hours of growth. The extreme-thermophilic bacteria of Kamchatka are similar to those from the hot springs of Japan.
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