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Sublethal cold shock in Vibrio parahaemolyticus

M J van den Broek, D A Mossel

    Applied and Environmental Microbiology
    |July 1, 1977
    PubMed
    Summary

    Low temperatures (2°C) damage Vibrio parahaemolyticus cell membranes. This membrane damage inhibits bacterial growth on salt-containing media, impacting food safety.

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    Area of Science:

    • Microbiology
    • Food Safety
    • Bacterial Physiology

    Background:

    • Vibrio parahaemolyticus is a significant foodborne pathogen.
    • Understanding cellular responses to cold stress is crucial for preventing contamination.

    Purpose of the Study:

    • To investigate the effects of low-temperature exposure on Vibrio parahaemolyticus.
    • To determine the impact of cold-induced cellular changes on bacterial viability and growth.

    Main Methods:

    • Exposure of Vibrio parahaemolyticus cultures to 2°C.
    • Assessment of cell membrane integrity.
    • Evaluation of bacterial growth on selective media (5% NaCl).

    Main Results:

    • Cold temperatures (2°C) induced significant membrane damage in Vibrio parahaemolyticus.
    • Damaged cells demonstrated reduced or absent growth on media with 5% NaCl.

    Conclusions:

    • Cold stress compromises Vibrio parahaemolyticus cell membrane integrity.
    • This membrane damage is directly linked to a loss of culturability on selective media, suggesting a mechanism for reduced infectivity or persistence in cold environments.

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