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Microbial food borne pathogens. Escherichia coli O157:H7
1Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, USA.
Summary
Escherichia coli O157:H7 is a significant foodborne pathogen causing severe illness like hemolytic uremic syndrome. Current control methods for this Shiga toxin-producing E. coli in livestock and non-heated foods remain limited.
Area of Science:
- Microbiology
- Food Safety
- Public Health
Background:
- Escherichia coli O157:H7 has become a major public health concern in recent decades.
- While most E. coli strains are harmless gut flora, certain strains, like O157:H7, are pathogenic.
- This pathogen is linked to severe gastrointestinal illnesses, including bloody diarrhea and hemolytic uremic syndrome (HUS).
Purpose of the Study:
- To highlight the emergence and significance of Escherichia coli O157:H7 as a pathogen.
- To discuss the transmission routes and associated diseases caused by Shiga toxin-producing E. coli.
- To review the challenges in controlling this pathogen in food and livestock.
Main Methods:
- Literature review on Escherichia coli O157:H7 emergence and impact.
- Analysis of transmission pathways, including foodborne routes.
- Examination of control difficulties and treatment limitations.
Main Results:
- Escherichia coli O157:H7 is a significant cause of foodborne illness, with cattle as a primary reservoir.
- The pathogen causes severe conditions such as HUS and thrombocytopenic purpura.
- Control is challenging due to its tolerance to low pH in non-heated foods.
Conclusions:
- Effective strategies to eliminate E. coli O157:H7 carriage in livestock are currently unavailable.
- Limited treatment options exist for humans, primarily supportive care.
- Further research is needed for better control and prevention of E. coli O157:H7 infections.