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Microbiological Quality and Safety of Fresh Pork Meat with Special Reference to Methicillin-Resistant S. aureus and

Alba Martinez-Laorden1, Celia Arraiz-Fernandez1, Gonzalo Ibañez-Torija1

  • 1Food Technology Department, CIVA Research Center, University of La Rioja, Madre de Dios 53, 26006 Logrono, La Rioja, Spain.

Veterinary Sciences
|June 25, 2025
PubMed

Insights

Multidrug-resistant bacteria, including methicillin-resistant Staphylococcus aureus (MRSA), are a concern in pork. This study found MRSA and other resistant bacteria in fresh pork, highlighting the need for better control measures.

Area of Science:

  • Food Microbiology
  • Antimicrobial Resistance
  • Veterinary Public Health

Background:

  • Growing prevalence of multidrug-resistant bacteria in food products, particularly meat.
  • Specific concern regarding methicillin-resistant Staphylococcus aureus (MRSA) in the food chain.
  • Need to assess the microbiological quality of fresh pork concerning staphylococcal contamination.

Purpose of the Study:

  • To evaluate the microbiological quality of fresh pork meat.
  • To determine the presence and antimicrobial resistance profiles of Staphylococcus aureus, other Staphylococcus spp., Mammaliicoccus spp., and Macrococcus spp.
  • Specifically assess resistance to methicillin and a range of other antibiotics.

Main Methods:

  • Analysis of 39 fresh pork meat samples.
  • Isolation and identification of staphylococcal species.
  • Antimicrobial susceptibility testing to determine resistance patterns.

Main Results:

  • Methicillin-resistant Staphylococcus aureus (MRSA) was detected in one pork sample.
  • The isolated MRSA strain exhibited resistance to eight antimicrobial families, including beta-lactams, macrolides, and fluoroquinolones.
  • Other multidrug-resistant strains, including Staphylococcus succinus, Mammaliicoccus sciuri, and Macrococcus caseolyticus, were also identified, showing resistance to 5-6 antimicrobial families.

Conclusions:

  • Fresh pork meat can harbor multidrug-resistant bacteria, including clinically significant MRSA.
  • The presence of extensively drug-resistant staphylococci in pork necessitates enhanced surveillance and control strategies.
  • Additional measures are crucial to mitigate the risk of MRSA transmission through pork products.
Keywords:
MRSAMacrococcus spp.Mammaliicoccus spp.S. aureusantimicrobial resistancefoodborne

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