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Related Experiment Videos

A simple and inexpensive method for maintaining a defined flora mouse colony.

R S Sedlacek, K A Mason

    Laboratory Animal Science
    |October 1, 1977
    PubMed
    Summary

    Maintaining a defined flora mouse colony proved challenging with standard autoclaving and aseptic techniques alone. Enhancements including laminar airflow benches and HEPA filtration significantly reduced airborne bacteria and eliminated specific contaminants.

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    Area of Science:

    • Microbiology
    • Animal Husbandry
    • Infectious Disease Control

    Background:

    • Standard autoclaving and aseptic techniques were insufficient for maintaining a defined flora mouse colony.
    • Bacterial contamination posed a significant challenge to colony integrity.

    Purpose of the Study:

    • To identify effective methods for maintaining a defined flora mouse colony.
    • To reduce bacterial contamination in an existing mouse colony.

    Main Methods:

    • Implemented a laminar airflow bench with a high-efficiency particulate air (HEPA) filter for sterile manipulation.
    • Installed ducting to filter all room air through the HEPA filter.
    • Culling or marking infected cages to prevent breeding from contaminated sources.

    Main Results:

    • The combined methods significantly reduced airborne bacterial counts within the animal room.
    • Specific bacterial contaminants, including Staphylococcus aureus, S. epidermidis, and streptococci, were eliminated from the colony.
    • The interventions were effective in establishing and maintaining a defined flora colony.

    Conclusions:

    • A combination of enhanced environmental controls and selective breeding practices is crucial for maintaining defined flora mouse colonies.
    • HEPA filtration and sterile manipulation environments are key to reducing airborne microbial load.
    • Targeted elimination of contaminated sources is essential for eradicating specific bacterial pathogens.

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