Estimating the proportion of community-associated methicillin-resistant Staphylococcus aureus: two definitions used in the USA yield dramatically different estimates

The objective of this retrospective study was to compare the prevalence of community-associated methicillin-resistant Staphylococcus aureus (CAMRSA) and healthcare-associated MRSA (HAMRSA) using healthcare risk factor exposure criteria with that obtained using Centers for Disease Control and Prevent...

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Bibliographic Details
Published in:	The Journal of hospital infection Vol. 60; no. 4; pp. 329 - 332
Main Authors:	Folden, D.V., Machayya, J.A., Sahmoun, A.E., Beal, J.R., Holzman, G.S., Helgerson, S.D., Lo, T.S.
Format:	Journal Article
Language:	English
Published:	Kent Elsevier Ltd 01-08-2005 Elsevier
Subjects:	Antibacterial agents Antibiotics. Antiinfectious agents. Antiparasitic agents Bacterial diseases Biological and medical sciences Community-acquired infections Community-Acquired Infections - epidemiology Community-Acquired Infections - microbiology Cross Infection - epidemiology Cross Infection - microbiology General aspects Hospital-acquired infections Hospitals, Veterans - statistics & numerical data Human bacterial diseases Human infectious diseases. Experimental studies and models Humans Infectious diseases Medical sciences Methicillin Resistance Pharmacology. Drug treatments Prevalence Retrospective Studies Risk factors Staphylococcal Infections - epidemiology Staphylococcal Infections - microbiology Staphylococcal infections, streptococcal infections, pneumococcal infections Staphylococcus aureus Staphylococcus aureus - drug effects United States - epidemiology United States North America America USA Prevalence Hospital-acquired infections Community-acquired infections Staphylococcus aureus Risk factors Nosocomial infection β-Lactams Definition Epidemiology Meticillin Infection Penicillin derivatives Antibiotic Community acquired infection Community- acquired infections Risk factor Bacteriosis Bacteria Micrococcales Micrococcaceae Antibacterial agent Staphylococcal infection
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Summary:	The objective of this retrospective study was to compare the prevalence of community-associated methicillin-resistant Staphylococcus aureus (CAMRSA) and healthcare-associated MRSA (HAMRSA) using healthcare risk factor exposure criteria with that obtained using Centers for Disease Control and Prevention (CDC) criteria. Cases were defined as CAMRSA or HAMRSA based on the general CDC guidelines for nosocomial infections, and then re-assessed with healthcare risk factor exposure criteria using a medical chart review. One hundred MRSA cases occurred at a mid-Western veterans affairs medical centre from November 2001 to November 2003. The proportion of these cases classified as CAMRSA differed dramatically when classified by healthcare risk factor exposure criteria (5%) compared with CDC nosocomial infection criteria (49%). Estimating the role of healthcare-related exposures and developing strategies to control MRSA can be markedly affected by the criteria used to determine CAMRSA and HAMRSA.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0195-6701 1532-2939
DOI:	10.1016/j.jhin.2004.12.025