Inactivation of Listeria monocytogenes on Frankfurters by Monocaprylin Alone or in Combination with Acetic Acid

Garcia, M.; Amalaradjou, M.A.R.; Nair, M.K.M.; Annamalai, T.; Surendranāth, Es; Lee, S.; Hoagland, T.; Dzurec, D.; Faustman, C.; Venkitanarayanan, K.

Inactivation of Listeria monocytogenes on Frankfurters by Monocaprylin Alone or in Combination with Acetic Acid

2007

The antilisterial activity of monocaprylin (MC) and its combination with acetic acid (AA) on frankfurters was investigated. Each frankfurter was surface inoculated with a three-strain mixture of Listeria monocytogenes to obtain an inoculation level of 4.0 log CFU per frankfurter, and then dipped for 35 s in sterile deionized water (45 or 50 degrees C) containing 1% ethanol (control), 50 mM MC plus 1% ethanol, 1% AA plus 1% ethanol, or 50 mM MC plus 1% AA plus 1% ethanol. Samples were vacuum packaged, stored at 4 degrees C for 77 days, and analyzed for L. monocytogenes. Sensory odor and color of frankfurters were evaluated using a 9-point hedonic scale. Color was also objectively measured using the Minolta Chroma Meter. From day 0 to day 77, population counts of L. monocytogenes on frankfurters dipped in antimicrobial solutions at 50 degrees C were consistently lower than the control counts. Similar results were observed for samples treated at 45 degrees C. However, L. monocytogenes grew readily on control samples at both temperatures. Dipping of frankfurters in antimicrobial solutions (45 or 50 degrees C) significantly reduced (P < 0.05) the populations of L. monocytogenes. After 70 days of storage, L. monocytogenes was completely killed in samples dipped in MC + AA solution at 50 degrees C. The antimicrobial treatments did not affect the odor or color of the samples (P > 0.05). Overall, results indicated that dipping of frankfurters with MC reduced L. monocytogenes, and inclusion of AA further enhanced MC antilisterial activity, without any negative effect on odor or color.

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Mots clés AGROVOC

acetic acid analysis antibacterial properties bacterial contamination beef cold storage color food contamination food packaging food preservation food preservation food storage glycerides humans listeria monocytogenes meat products meat quality methods microbiology octanoic acid ph pharmacology pigmentation pork refrigeration sensory evaluation temperature vacuum packaging

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Publié dans

Journal of food protection

Volume 70 Numéro 7 Pagination 1594 - 1599 ISSN 0362-028X

Editeur

Multidisciplinary Digital Publishing Institute

D'autres materias

Hydrogen-ion concentration; Odorants; Hot dogs; Drug effects; Sodium acetate; Food surfaces; Food preservatives; Food pathogens; Storage time; Appearance (quality); Food preservatives; Stress tolerance; Drug; Dose-response relationship; Consumer product safety; Food contamination and toxicology - livestock products; Growth & development; Off odors; Time factors; Drug synergism; Food processing (general) - livestock products; Food composition and quality - livestock products; Pathogen survival; Caprylates; Microbial; Colony count; Food packaging (general) - livestock products; Food storage - livestock products

Langue

anglais

Type

Journal Article; Text

Sur AGRIS depuis: 2024-02-29

Format: MODS

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Inactivation of Listeria monocytogenes on Frankfurters by Monocaprylin Alone or in Combination with Acetic Acid

2007

Mots clés AGROVOC

Informations bibliographiques