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Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
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Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)

Published on: February 9, 2011

Methicillin-resistant Staphylococcus aureus (MRSA) contamination of retail pork

J Scott Weese1, Richard Reid-Smith, Joyce Rousseau

  • 1Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario. jsweese@uoguelph.ca

The Canadian Veterinary Journal = La Revue Veterinaire Canadienne
|October 2, 2010
PubMed

Insights

Methicillin-resistant Staphylococcus aureus (MRSA) was found in 7.7% of Canadian retail pork samples. This finding raises concerns about potential foodborne transmission and requires further investigation into the role of meat in MRSA infections.

Area of Science:

  • Veterinary microbiology
  • Food safety
  • Public health microbiology

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) has been increasingly isolated from food-producing animals.
  • Concerns exist regarding the potential for foodborne transmission of MRSA to humans.
  • Understanding MRSA prevalence in retail meat is crucial for assessing public health risks.

Purpose of the Study:

  • To determine the prevalence of MRSA contamination in retail pork products across four Canadian provinces.
  • To characterize the genetic profiles of MRSA isolates found in retail pork.

Main Methods:

  • A cross-sectional study was conducted on retail pork samples from 402 sources in 4 Canadian provinces.
  • MRSA isolation and identification were performed using standard microbiological techniques.
  • Pulsed-field gel electrophoresis (PFGE) and spa typing were used for MRSA clone characterization.

Main Results:

  • MRSA was detected in 7.7% (31/402) of the retail pork samples.
  • The most common MRSA clone identified was Canadian epidemic MRSA (CMRSA)-5 (39%), typically found in horses.
  • Other identified clones included spa 539/t034 (32%), associated with food animals internationally, and CMRSA-2 (29%), a human epidemic clone previously found in Canadian pigs.

Conclusions:

  • Retail pork in Canada is a potential source of MRSA contamination.
  • The presence of diverse MRSA clones, including those linked to animals and humans, highlights the complexity of transmission pathways.
  • Further research is necessary to elucidate the significance of retail meat contamination in MRSA infections and its implications for public health.

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