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Low socioeconomic status has a long-established link with high risk for infections. Concerned about the emergence of community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) infections in hospitals, researchers in Britain compared markers of socioeconomic deprivation with the transmission routes of CA- and healthcare-associated (HA) MRSA strains in three boroughs of South East London.
From November 2011 through February 2012, they identified 471 MRSA isolates in microbiology laboratories that exclusively served a catchment area with 867,254 usual residents. All isolates were genotyped (60% were HA-MRSA) and mapped to small geographic areas that each had roughly 650 households and 1500 residents.
Statistical modeling revealed…