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Updated: Aug 24, 2025
Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
Technical specifications for a baseline survey on the prevalence of methicillin-resistant Staphylococcus aureus
Abstract:
The European Commission requested scientific and technical assistance in the preparation of a EU-wide baseline survey protocol for a European Union (EU) coordinated monitoring programme on the prevalence of methicillin-resistant Staphylococcus Aureus (MRSA) in pigs. The objective of the survey is to estimate the MRSA prevalence in batches of fattening pigs at slaughter at both European and national levels, with a 95% level of confidence and a level of precision of 10% considering an expected prevalence of 50%. The survey protocol defines the target population, the sample size for the survey, sample collection requirements, the analytical methods (for isolation, identification, phenotypic susceptibility testing and further genotypic testing of MRSA isolates), the data reporting requirements and the plan of analysis. The samples are to be analysed according to the laboratory protocols available on the European Union Reference Laboratory (EURL-AR) website. Generalised linear models will be used to estimate proportion (with 95% confidence intervals) of batches of slaughter pigs tested positive to MRSA. The necessary data to be reported by the EU Member States to support this baseline survey are presented in three data models. The results of the survey should be reported using the EFSA data collection framework.
Insights
A new EU-wide survey protocol will monitor methicillin-resistant Staphylococcus Aureus (MRSA) in pigs. This aims to estimate MRSA prevalence in slaughter pigs across Europe and member states.
Area of Science:
- Veterinary Microbiology
- Food Safety
- Public Health
Background:
- Methicillin-resistant Staphylococcus Aureus (MRSA) poses a significant threat to animal and human health.
- A coordinated monitoring program is needed to assess MRSA prevalence in livestock populations within the European Union.
Purpose of the Study:
- To develop a standardized EU-wide baseline survey protocol for monitoring MRSA in pigs.
- To estimate the prevalence of MRSA in batches of fattening pigs at slaughter across European Union member states.
Main Methods:
- The protocol outlines target population, sample size, collection, and analytical methods for MRSA detection.
- Includes phenotypic and genotypic testing of isolates, adhering to European Union Reference Laboratory (EURL-AR) guidelines.
- Statistical analysis using generalized linear models to estimate prevalence with 95% confidence intervals.
Main Results:
- The protocol specifies data reporting requirements for EU Member States.
- Utilizes a standardized data collection framework for consistent reporting across the EU.
Conclusions:
- The established protocol will provide reliable data on MRSA prevalence in pigs.
- Facilitates informed decision-making for risk management and control strategies within the EU.
