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Related Concept Videos

Colonisation of Pathogens01:25

Colonisation of Pathogens

Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
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Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...

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Related Experiment Video

Updated: Jul 18, 2026

Colonization with Murine pks+ Escherichia coli under Non-Inflammatory Conditions
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Published on: March 10, 2026

Critical colonization--the concept under scrutiny.

Richard J White1, Keith F Cutting

  • 1Grampian NHS Trust, Scotland.

Ostomy/Wound Management
|December 6, 2006
PubMed
Summary

Chronic wound infection is a significant challenge. Critical colonization, a key phase, requires further research to define its role in wound healing and inform clinical treatment strategies.

Area of Science:

  • Wound healing research
  • Clinical microbiology
  • Infectious diseases

Background:

  • Chronic wound infection leads to high morbidity.
  • The Wound Infection Continuum model illustrates bioburden impact.
  • Critical colonization is a proposed stage preceding overt infection.

Purpose of the Study:

  • To explore the concept of critical colonization in chronic wounds.
  • To clarify the role of microbial bioburden in wound pathology.
  • To guide clinicians in recognizing and treating critical colonization.

Main Methods:

  • Review of existing literature on chronic wound infection.
  • Analysis of the Wound Infection Continuum model.
  • Discussion of the microbiological versus clinical perspective of critical colonization.

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Last Updated: Jul 18, 2026

Colonization with Murine pks+ Escherichia coli under Non-Inflammatory Conditions
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Published on: March 10, 2026

The Ex Vivo Colon Organ Culture and Its Use in Antimicrobial Host Defense Studies
10:40

The Ex Vivo Colon Organ Culture and Its Use in Antimicrobial Host Defense Studies

Published on: February 13, 2017

Inoculation Strategies to Infect Plant Roots with Soil-Borne Microorganisms
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Main Results:

  • Critical colonization is a poorly defined state, better understood microbiologically than clinically.
  • Wounds in critical colonization may progress to infection, remain static, or improve with intervention.
  • The impact of bioburden alteration on wound pathology is central to understanding this phase.

Conclusions:

  • Further research is essential to define critical colonization.
  • Clarifying the role of bioburden is crucial for effective chronic wound management.
  • Improved understanding will aid clinicians in timely and appropriate treatment decisions.