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Associated mycoflora of rye bread

F Lund1, O Filtenborg, S Westall

  • 1Department of Biotechnology, Technical University of Denmark, Lyngby, Denmark.

Letters in Applied Microbiology
|October 1, 1996
PubMed
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Dominant fungi like Penicillium roqueforti spoil packaged rye bread. Improving factory hygiene significantly reduced mould growth, ensuring product quality.

Area of Science:

  • Food Microbiology
  • Mycology
  • Industrial Microbiology

Background:

  • Mould contamination is a significant issue affecting the shelf-life and safety of packaged rye bread.
  • Understanding the mycoflora associated with rye bread is crucial for developing effective spoilage control strategies.

Purpose of the Study:

  • To identify the dominant fungal species contaminating rye bread.
  • To investigate the sources of fungal contamination within a rye bread production environment.
  • To assess the impact of improved hygiene practices on reducing mould growth.

Main Methods:

  • Isolation and identification of 3425 fungal isolates from packaged rye bread over a 4-year period.
  • Fungal analysis of the production environment to pinpoint contamination sources.

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  • Implementation and evaluation of enhanced cleaning and disinfection protocols.

    • Main Results:

    • Penicillium roqueforti (27%), P. corylophilum (20%), and Eurotium species (15%) were the most prevalent spoilage fungi.
    • Less common but significant spoilers included Penicillium decumbens, Paecilomyces variotti, and Aspergillus flavus.
    • Identification of specific factory locations as potential contamination sources.
    • Improved cleaning and disinfection led to a rapid and significant decrease in mould contamination.

    Conclusions:

    • Effective control of rye bread spoilage requires a comprehensive understanding of associated mycoflora.
    • Targeting and eliminating contamination sources in the production environment is key to reducing mould growth.
    • Enhanced hygiene protocols are critical for maintaining the quality and safety of packaged rye bread.