SHM Converge Scientific Abstract ePoster Gallery-Evaluating Transmission and Control of Healthcare-Associated Mrsa With Genome Sequencing

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This poster studies the transmission and control of healthcare-associated MRSA using whole-genome sequencing (WGS) data from isolates collected over 12 months in East of England. The authors used branching process models to estimate key transmission parameters, including the effective reproduction number and dispersion, and to evaluate how different control strategies might reduce MRSA burden.<br /><br />The analysis found an estimated reproduction number of 0.38, suggesting that transmission is generally limited, but the dispersion parameter of 0.53 indicates strong transmission heterogeneity: a relatively small number of cases likely account for a disproportionate share of spread. This implies that targeted interventions may be especially effective.<br /><br />The main conclusion is that control measures aimed at patients most likely to transmit MRSA can substantially reduce overall incidence. In particular, reducing the number of new infection clusters may have a larger impact than simply lowering transmissibility within existing clusters. The poster suggests that primary prevention measures—such as better diabetes control—could potentially have a greater effect on healthcare-associated MRSA than intensified hospital-based measures like stricter contact precautions or enhanced room decontamination.<br /><br />Overall, the work highlights the value of genomic epidemiology for identifying transmission clusters and improving infection control strategies. The authors argue that future mechanistic models combining sequencing with patient, pathogen, and environmental data could support more precise, patient-specific recommendations for MRSA prevention and may be useful for other healthcare-associated infections as well.

Asset Subtitle

Seth Blumberg

Meta Tag

Author List Bo Shopsin, Seth Blumberg

Category Research

Concept MRSA Colonization

Concept Transmission Dynamics

Concept MRSA Control

Concept Effective Reproduction Number

Concept MRSA Transmission

Distinguished Non-Finalist

Presenter Organization Univeristy of California, San Francisco

Presenting Author Seth Blumberg

Track Patient Safety

Keywords

MRSA

healthcare-associated infection

whole-genome sequencing

genomic epidemiology

transmission dynamics

branching process model

effective reproduction number

dispersion parameter

infection control

targeted interventions

MRSA Colonization

Transmission Dynamics

MRSA Control

Effective Reproduction Number

MRSA Transmission