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Microbial changes in vacuum-packed chilled pork during storage.

Fan Zhao, Guanghong Zhou, Keping Ye

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    |December 3, 2014
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    Summary
    This summary is machine-generated.

    Microbial analysis of vacuum-packed chilled pork revealed increasing bacterial counts and diversity over 21 days, indicating spoilage. Key bacterial families identified may contribute to meat deterioration, highlighting the need for effective decontamination in the meat industry.

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    Area of Science:

    • Food Microbiology
    • Meat Science
    • Microbial Ecology

    Background:

    • Vacuum packaging is a common method for extending the shelf-life of chilled meat products.
    • Understanding the microbial dynamics during chilled storage is crucial for ensuring meat safety and quality.
    • Previous studies have explored microbial changes in meat, but detailed analysis of vacuum-packed pork during extended chilled storage is needed.

    Purpose of the Study:

    • To investigate the microbial composition and diversity in vacuum-packed chilled pork during 21 days of storage.
    • To identify major bacterial genera and families associated with meat spoilage.
    • To determine critical time points for microbial changes during chilled storage.

    Main Methods:

    • Bacterial DNA extraction and sequencing (28,216 sequences) from vacuum-packed pork samples.
    • Bioinformatic analysis to assess microbial diversity and identify bacterial genera and phyla.
    • Monitoring of microbial counts and changes over a 21-day chilled storage period.

    Main Results:

    • Microbial counts increased significantly during 21 days of chilled storage, correlating with meat deterioration.
    • Over 200 bacterial genera from eighteen phyla were identified, with origins likely linked to contamination during processing.
    • The seventh day of storage was identified as a critical point for microbial diversity shifts.
    • Major bacterial families identified include Micrococcaceae, Flavobacteriaceae, Enterobacteriaceae, Lactobacillaceae, and Carnobacteriaceae, potentially involved in spoilage.

    Conclusions:

    • The microbial community in vacuum-packed chilled pork evolves significantly during storage, with specific bacterial families implicated in spoilage.
    • While the direct impact of these microbes on meat hygiene and safety requires further investigation, controlling contamination throughout the supply chain is essential.
    • Effective decontamination strategies are vital for the meat industry to guarantee safety and enhance the shelf-life of fresh pork.