Catalase, superoxide dismutase, and hemolysin activities and heat susceptibility of Listeria monocytogenes after growth in media containing sodium chloride.

Applied and Environmental Microbiology
A W Dallmier, S E Martin

Abstract

The activities of catalase, superoxide dismutase, and a thiol-activated hemolysin produced by four strains of Listeria monocytogenes propagated in media containing various concentrations of sodium chloride were examined. L. monocytogenes 7644 showed an increase in catalase, superoxide dismutase, and thiol-activated hemolysin activities when grown in a medium containing 2.5% (wt/vol) NaCl followed by a decrease in activities when propagated in media containing salt concentrations higher than 2.5%. L. monocytogenes LCDC 81-861 demonstrated enhanced catalase activity when grown in media containing NaCl ranging from 1.5 to 4.6% and increased superoxide dismutase activity when propagated in media containing 1.5 to 3.5% NaCl. L. monocytogenes LCDC 81-861 did not exhibit any detectable hemolysin activity under the conditions tested. After growth in various NaCl-containing media, both strains were subjected to sublethal heat injury for 30 min at 55 degrees C. L. monocytogenes LCDC 81-861 showed increased sensitivity to the heat treatment when grown in media containing 4.6 and 6.5% NaCl, whereas L. monocytogenes 7644 did not exhibit enhanced heat lability.

References

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Citations

Dec 1, 1996·European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology·H A ElsnerD Mack
Jan 1, 1992·Free Radical Research Communications·A Haas, W Goebel
Apr 4, 2000·Letters in Applied Microbiology·B Nørrung, J K Andersen
Sep 30, 2000·Applied and Environmental Microbiology·A J MillerB S Eblen
Feb 1, 2020·Environmental Science. Processes & Impacts·Jingyu WangBojie Yuan
Jul 1, 1993·Applied and Environmental Microbiology·E R MyersS E Martin
Jul 1, 1994·Applied and Environmental Microbiology·J A Vasconcelos, H G Deneer

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