The effect of various acidulants on the growth of Listeria monocytogenes |
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| Authors: | J.M. Farber G.W. Sanders S. Dunfield R. Prescott |
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| Affiliation: | Microbiology Research Division, Health Protection Branch, Bureau of Microbial Hazards, Health and Welfare Canada, Ottawa, Ontario, K1A 0L2, Canada |
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| Abstract: | The ability of four Listeria monocytogenes strains to initiate growth in brain heart infusion broth adjusted to various pH values with either acetic, lactic, citric or hydrochloric acid was investigated. Acetic acid was the most effective inhibitor tested, since in broth adjusted with this acid a higher minimum pH was required for growth of the various strains at both 4 and 30°C, as compared with broth adjusted with the other acidulants. The minimum pH value required for the initiation of growth of L. monocytogenes ranged from 5·0 to 5·7 at 4°C, and from 4·3 to 5·2 at 30°C, depending upon the acidulant used. |
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