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Heat‐induced resistance of Bacillus stearothermophilus spores
Author(s) -
Etoa F.X.,
Michiels L.
Publication year - 1988
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.1988.tb01211.x
Subject(s) - spore , heat resistance , bacillus (shape) , library science , geobacillus stearothermophilus , bacillaceae , biology , microbiology and biotechnology , bacteria , thermophile , computer science , materials science , genetics , bacillus subtilis , composite material
Spores of Bacillus stearothermophilus CNCH 5781 were suspended in distilled water or nutrient medium. A 28 μl aliquot of each was inoculated into haematocrit capillaries and subjected at different time intervals to sublethal temperatures of 63° or 100°C as heat activation for germination. This was followed by heat treatment at 121·1°C and the heat parameter D 121·1 was measured. Contrary to standard observations, heat resistance was observed to increase following activation, a phenomenon which we named ‘heat‐induced resistance’.