Methicillin-resistant Staphylococcus aureus: a food-borne pathogen?

Area of Science:

• Microbiology
• Food Safety
• Veterinary Medicine

Background:

• Methicillin-resistant Staphylococcus aureus (MRSA) initially emerged as a hospital-associated pathogen (HA-MRSA).
• The emergence of community-associated MRSA (CA-MRSA) and livestock-associated MRSA (LA-MRSA) has raised concerns about food safety.
• LA-MRSA has been observed to transfer between animals and humans, prompting investigations into its zoonotic potential.

Purpose of the Study:

• To review current knowledge on MRSA in food-producing animals and foods.
• To assess the role of MRSA from food-producing animals as potential food-borne pathogens.
• To consider methods for tracking the spread of MRSA.

Main Methods:

• Literature review of scientific publications.
• Analysis of data on MRSA prevalence in food-producing animals and food products.
• Evaluation of studies on animal-to-human MRSA transmission.

Main Results:

• MRSA, including HA-MRSA, CA-MRSA, and LA-MRSA strains, can be present in or on food intended for human consumption.
• Evidence suggests animal-to-animal and animal-to-human transmission of LA-MRSA.
• The presence of MRSA on food does not confirm it as a food-borne pathogen.

Conclusions:

• While MRSA can contaminate food, it is not currently considered a food-borne pathogen based on available literature.
• Further research is needed to fully understand the risks associated with LA-MRSA and CA-MRSA in the food chain.
• Effective tracking tools are essential for monitoring MRSA spread.