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Mycobacteria in biofilms.

R Schulze-Röbbecke1, R Fischeder

  • 1Hygiene-Institut der Universität Bonn.

Zentralblatt Fur Hygiene Und Umweltmedizin = International Journal of Hygiene and Environmental Medicine
|June 1, 1989
PubMed
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Biofilms serve as a crucial habitat for aquatic mycobacteria, including Mycobacterium kansasii and M. flavescens. These findings suggest biofilms may hinder chemical disinfection efforts in water systems.

Area of Science:

  • Environmental microbiology
  • Water quality research
  • Bacterial ecology

Background:

  • Aquatic mycobacteria pose challenges in water distribution systems.
  • Understanding their habitat is key to controlling contamination.

Purpose of the Study:

  • To investigate the role of biofilms as a habitat for aquatic mycobacteria.
  • To quantify mycobacterial presence within biofilms in a water system.

Main Methods:

  • Culturing and quantifying mycobacteria from a biofilm on a silicone tube.
  • Microscopic analysis (Ziehl-Neelsen staining) of biofilm composition.

Main Results:

  • Biofilms harbored significant concentrations of Mycobacterium kansasii (2 x 10^5 cfu/cm2) and Mycobacterium flavescens (7 x 10^4 cfu/cm2).

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  • Acid-fast bacteria constituted 1/4 to 1/3 of visualized biofilm organisms, often in microcolonies.

    • Conclusions:

    • Biofilms are a significant habitat and proliferation site for aquatic mycobacteria.
    • Biofilm presence may explain difficulties in chemical disinfection of contaminated water distribution systems.