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Microflora of the Gastrointestinal Tract

A Review
  • Wei-Long Hao
  • Yuan-Kun Lee
Part of the Methods in Molecular Biology book series (MIMB, volume 268)

Abstract

The mucosal surface of the human gastrointestinal (GI) tract is about 200–300 m2 and is colonized by 1013–14 bacteria of 400 different species and subspecies. Savage (1) has defined and categorized the gastrointestinal microflora into two types, autochthonous flora (indigenous flora) and allochthonous flora (transient flora). Autochthonous microorganisms colonize particular habitats, i.e., physical spaces in the GI tract, whereas allochthonous microorganisms cannot colonize particular habitats except under abnormal conditions. Most pathogens are allochthonous microorganisms; nevertheless, some pathogens can be autochthonous to the ecosystem and normally live in harmony with the host, except when the system is disturbed (2).

Keywords

Sialic Acid Bacterial Adhesion Intestinal Mucus Mucus Glycoprotein Indigenous Microflora 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Humana Press Inc. Totowa, NJ 2004

Authors and Affiliations

  • Wei-Long Hao
    • 1
  • Yuan-Kun Lee
    • 1
  1. 1.Department of MicrobiologyNational University of SingaporeSingapore

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