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The Resistances of Spores of the Genus Bacillus to Phenol, Heat and Radiation
Author(s) -
Briggs A.
Publication year - 1966
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1966.tb03500.x
Subject(s) - bacillus subtilis , spore , sterilization (economics) , heat resistance , bacillus licheniformis , phenol , bacillus (shape) , radiation resistance , dry heat , endospore , bacillales , radiation , chemistry , microbiology and biotechnology , biology , bacteria , food science , materials science , organic chemistry , physics , composite material , genetics , quantum mechanics , monetary economics , economics , foreign exchange market , foreign exchange
S ummary . The resistance of the spores of 6 species of Bacillus to 5% (w/v) of phenol at 37°, heat and gamma radiation has been determined. Two, and with heat treatment three, different shapes of log survivor time curves were observed with each lethal agent. In relation to the conditions employed in accepted sterilization procedures, all of the strains were highly resistant to phenol. Bacillus stearothermophilus, B. licheniformis and B. subtilis were resistant to gamma radiation, all three having a D value of 0.22 Mrad. Only B. stearothermophilus was heat resistant having a D value of 22.6 min at 115°. When the relative order of resistance to each agent was considered, with the exception of B. stearothermophilus , the spores showed little evidence of any relationship between their resistances to phenol, heat and gamma radiation.