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  3. Pyxigraphic Sampling To Enumerate Methanogens And Anaerobes In The Right Colon Of Healthy Humans
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  3. Pyxigraphic Sampling To Enumerate Methanogens And Anaerobes In The Right Colon Of Healthy Humans

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Pyxigraphic sampling to enumerate methanogens and anaerobes in the right colon of healthy humans

P Pochart1, F Lémann, B Flourié

  • 1INSERM U290, Hôpital Saint-Lazare, Paris, France.

Gastroenterology
|November 1, 1993

View abstract on PubMed

Summary
This summary is machine-generated.

A new capsule-based method called pyxigraphy allows for safe and remote sampling of the proximal colon. This technique revealed that methane-producing microbes (methanogens) are more concentrated in the distal colon of methane excretors.

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Area of Science:

  • Microbiology
  • Gastroenterology
  • Biotechnology

Background:

  • Studying proximal human colonic flora is challenging due to limited sampling methods.
  • A prototype technique, pyxigraphy, was developed for remote gastrointestinal sampling.
  • Pyxigraphy aims to overcome limitations in accessing and analyzing the colonic microbiome.

Purpose of the Study:

  • To describe the pyxigraphy technique for remote gastrointestinal sampling.
  • To investigate the distribution of methanogens in the colon of methane (CH4) excretors versus non-excretors.

Main Methods:

  • Pyxigraphic sampling method used in six CH4 excretors and four non-CH4 excretors.
  • Samples of right colonic contents obtained via swallowed capsules.
  • Enumeration of methanogens and total anaerobes in colonic and fecal samples.

Main Results:

  • In CH4 excretors, methanogens were significantly higher in feces (12%) than right colon (0.003%) (P < 0.02).
  • In non-CH4 excretors, methanogen concentrations were minimal (<0.003%) in both sample types.
  • Methanogen distribution differed significantly between CH4 excretors and non-excretors.

Conclusions:

  • Pyxigraphy offers a noninvasive, simple, and safe method for studying proximal colonic microbial populations.
  • Methanogens preferentially colonize the distal colon in individuals who excrete methane.
  • This study highlights the utility of pyxigraphy in microbiome research.