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Pathogenic Escherichia coli found in food.

O Olsvik1, Y Wasteson, A Lund

  • 1Department of Microbiology and Immunology, Norwegian College of Veterinary Medicine, Oslo.

International Journal of Food Microbiology
|January 1, 1991
PubMed
Summary

Escherichia coli (E. coli) can be pathogenic, causing various diseases like diarrhea, wound infections, and meningitis. Understanding E. coli

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Area of Science:

  • Microbiology
  • Pathogen Identification
  • Food Safety

Background:

  • Escherichia coli (E. coli) is a bacterium commonly found in the intestinal flora of humans and animals.
  • While often considered non-pathogenic, certain E. coli strains can cause significant diseases, including diarrheal diseases, wound infections, meningitis, septicemia, and immunological disorders.
  • Pathogenic E. coli strains are categorized into groups such as enterotoxigenic E. coli (ETEC), enteropathogenic E. coli (EPEC), enteroinvasive E. coli (EIEC), and enterohemorrhagic E. coli (EHEC), each with distinct pathogenic mechanisms.

Purpose of the Study:

  • To highlight the potential pathogenicity of Escherichia coli strains.
  • To differentiate between various pathogenic E. coli groups and their associated diseases.
  • To discuss the transmission routes and sources of E. coli infections, particularly through food and water.

Main Methods:

  • Literature review and synthesis of existing knowledge on Escherichia coli pathogenicity.
  • Classification of E. coli strains based on pathogenic mechanisms (toxin production, invasion, adhesion).
  • Analysis of epidemiological data regarding foodborne and waterborne E. coli outbreaks.

Main Results:

  • Pathogenic E. coli strains cause a spectrum of diseases, including various diarrheal syndromes, hemolytic uremic syndrome, and reactive arthritis.
  • ETEC strains produce heat-labile and heat-stable enterotoxins and possess fimbriae for intestinal colonization.
  • EHEC strains produce cytotoxins (vero-cytotoxins/shiga-like toxins) and are often associated with contaminated meat products, while EIEC strains are primarily a human pathogen transmitted via contaminated food and water.

Conclusions:

  • E. coli should be recognized as a potential pathogen with diverse disease-causing capabilities.
  • Understanding the specific pathogenic mechanisms and transmission routes of different E. coli strains is crucial for public health.
  • Further research is needed to elucidate the role of food in the transmission of non-enteric E. coli diseases.

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