Thermotolerance of Listeria monocytogenes and Salmonella typhimurium after sublethal heat shock

The effect of prior heat shock on thermotolerance of Listeria monocytogenes and Salmonella typhimurium broth culture was determined. Bacteria were grown at the permissive temperature of 35 degrees C, sublethally heated at 35 (control), 42, 48, and 52 degrees C (nonpermissive control) for various tim...

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Bibliographic Details
Published in:Applied and Environmental Microbiology 1990-10, Vol.56 (10), p.3216-3219
Main Authors: Bunning, V.K. (Food and Drug Administration, Washington, DC), Crawford, R.G, Tierney, J.T, Peeler, J.T
Format: Article
Language:English
Subjects:
Action of physical and chemical agents on bacteria
AGOTAMIENTO POR EL CALOR
Bacteriology
Biological and medical sciences
CALOR
CHALEUR
COUP DE CHALEUR
Fundamental and applied biological sciences. Psychology
Hot Temperature
LISTERIA MONOCYTOGENES
Listeria monocytogenes - physiology
Microbiology
RESISTANCE A LA TEMPERATURE
RESISTENCIA A LA TEMPERATURA
SALMONELLA TYPHIMURIUM
Salmonella typhimurium - physiology
Species Specificity
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Summary:The effect of prior heat shock on thermotolerance of Listeria monocytogenes and Salmonella typhimurium broth culture was determined. Bacteria were grown at the permissive temperature of 35 degrees C, sublethally heated at 35 (control), 42, 48, and 52 degrees C (nonpermissive control) for various times, and inactivated at either 57.8 or 52 degrees C. The induction of increased thermotolerance by heat shock, although consistent within each experiment, was generally not significant for L. monocytogenes; the increase was significant for S. typhimurium. Temperature shift experiments with L. monocytogenes suggested that induced thermotolerance was not long lived unless the shock temperature was maintained
ISSN:0099-2240
1098-5336
DOI:10.1128/AEM.56.10.3216-3219.1990