[Effect of initiated spores on the resistance of nongerminated resting forms of Bacillus cereus remaining in the suspension to the action of damaging agents].
The elevated resistance of a Bacillus cereus spore suspension against the action of UV was found to depend on the quantity of resting forms initiated in the suspension prior to an irradiation. The resistance against UV increased 80-50 times if 60-90% of spores were initiated in the suspension as compared to that of the original resting forms. When suspensions containing 40% of non-germinated B. cereus spores were kept at 4 degrees C for 14 days, the latter became 10 and 14 times more resistant to elevated temperature (90 degrees C) and chloramine (2.5%), respectively, as compared to control intact spores. The higher resistance of non-germinated spores against the action of physical and chemical damaging agents was registered within the entire period of experiments (over three months). This phenomenon was not observed if ca. 100% of spores were initiated in a suspension. The resistance of initiated spores against the action of UV was 40 times lower than that of B. cereus resting forms.
D001409:Bacillus cereus / Q000187:drug effects / Q000502:physiology* / Q000528:radiation effects; D002700:Chloramines / Q000494:pharmacology; D003470:Culture Media; D004352:Drug Resistance, Microbial; D011836:Radiation Tolerance; D013171:Spores, Bacterial / Q000187:drug effects / Q000502:physiology / Q000528:radiation effects; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays
D002700:Chloramines; D003470:Culture Media; C030816:chloramine
Vliianie initsiirovannykh spor na ustoĭchivost' ostavshikhsia v suspenzii neprorosshikh pokoiashchikhsia form Bacillus cereus k deĭstviiu povrezhdaiushchikh agentov.