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Sources of Food Contamination01:29

Sources of Food Contamination

Contamination of food by microbial agents and natural toxins poses significant risks to public health. These hazards can be introduced at various points across the food supply chain, ranging from environmental sources to processing and storage stages. Understanding these contamination pathways is critical for developing strategies to ensure food safety.Seafood is particularly vulnerable to contamination through both environmental exposure and microbial colonization. Toxins from harmful algal...
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Investigation of Disease Outbreaks

Multistate foodborne outbreaks pose significant public health risks and require meticulous investigation to identify sources and implement control measures. The Centers for Disease Control and Prevention (CDC) utilizes a dynamic seven-step process for these investigations, integrating data from laboratories, interviews, and environmental assessments to protect public health.Outbreak Detection: The detection of multistate outbreaks typically begins with PulseNet, the CDC's national laboratory...
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Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291
06:51

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Published on: December 10, 2016

Clostridium difficile in vegetables, Canada.

D S Metcalf1, M C Costa, W M V Dew

  • 1University of Guelph, Guelph, Ontario, Canada. dmetcalf@uoguelph.ca

Letters in Applied Microbiology
|November 12, 2010
PubMed
Summary
This summary is machine-generated.

Clostridium difficile (CDI) was found in 4.5% of retail vegetables. All toxigenic isolates were linked to human CDI cases, suggesting vegetables may be a food safety concern.

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A Protocol to Characterize the Morphological Changes of Clostridium difficile in Response to Antibiotic Treatment
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Published on: May 25, 2017

Area of Science:

  • Food Microbiology
  • Infectious Diseases
  • Public Health

Background:

  • Clostridium difficile is a significant gastrointestinal pathogen in humans and animals.
  • Previous isolation from foods like meat and salads raises concerns about foodborne transmission of C. difficile infection (CDI).

Purpose of the Study:

  • To isolate and characterize Clostridium difficile from retail vegetables.
  • To assess the potential role of vegetables as a source of human CDI.

Main Methods:

  • Vegetables were sourced from 11 grocery stores in Guelph, Ontario.
  • Isolates were identified using enrichment culture, ribotyping, PFGE, toxinotyping, and PCR for toxin genes.

Main Results:

  • Clostridium difficile was isolated from 4.5% (5/111) of the tested vegetables.
  • Two ribotypes and two toxinotypes were identified among the isolates.
  • Three isolates belonged to ribotype 078/NAP 7/toxinotype V, carrying all three toxin genes; the remaining two shared a ribotype with a known human CDI strain.

Conclusions:

  • Despite low contamination levels, all isolated C. difficile strains were toxigenic and associated with CDI.
  • The presence of CDI-associated isolates in vegetables indicates a potential food safety risk, though implications require further study.