Behavior of Listeria monocytogenes in the presence of sodium propionate together with food acids

Tryptose broth (TB) containing 0.00, 0.05, 0.15, or 0.3% sodium propionate was adjusted to pH 5.0 or 5.6 with acetic, tartaric, lactic, or citric acid, inoculated to contain ca. 10(3) CFU of Listeria monocytogenes/ml and incubated at 13 or 35 degrees C. The bacterium grew in all controls (free of pr...

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Bibliographic Details
Published in:Journal of food protection 1992-04, Vol.55 (4), p.241-245
Main Authors: El-Shenawy, Moustafa A, Marth, Elmer H
Format: Article
Language:English
Subjects:
acetic acid
acide acetique
acide citrique
acide lactique
acide tartrique
acido acetico
acido citrico
acido lactico
acido tartarico
alimentos
antimicrobial properties
Biological and medical sciences
citric acid
Food industries
Food microbiology
foods
Fundamental and applied biological sciences. Psychology
lactic acid
Listeria monocytogenes
produit alimentaire
propiedades antimicrobianas
propionate sel
propionates salts
propionatos sales
propriete antimicrobienne
sodio
sodium
tartaric acid
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Summary:Tryptose broth (TB) containing 0.00, 0.05, 0.15, or 0.3% sodium propionate was adjusted to pH 5.0 or 5.6 with acetic, tartaric, lactic, or citric acid, inoculated to contain ca. 10(3) CFU of Listeria monocytogenes/ml and incubated at 13 or 35 degrees C. The bacterium grew in all controls (free of propionate) under all conditions; however, only slight growth occurred at 13 degrees C when the pH was adjusted to 5.0 with acetic or tartaric acid. Growth also occurred at 13 and 35 degrees C when TB adjusted to pH 5.6 with acetic or tartaric acid contained 0.05 or 0.15% propionate, but 0.3% inhibited growth of the pathogen. When the pH of TB was adjusted to 5.0 with the same acids, L. monocytogenes was inhibited or inactivated by 0.15 or 0.3% propionate. The pathogen grew at 13 or 35 degrees C in TB that contained 0.05 or 0.15% propionate and was adjusted to pH 5.6 with lactic or citric acid although the lag phase was prolonged as the concentration of propionate was increased. Under these conditions, propionate at 0.3% occasionally inhibited growth of L. monocytogenes. Growth was reduced and sometimes inhibited completely by 0.15 or 0.3% propionate when the pH of TB was adjusted to 5.0 with the same acids.
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X-55.4.241