UNIGE document Scientific Article
previous document  unige:7306  next document
add to browser collection
Title

Evaluating the probability of previously unknown carriage of MRSA at hospital admission

Authors
Published in American Journal of Medicine. 2006, vol. 119, no. 3, p. 275 e215-223
Abstract PURPOSE: We determined the prevalence and risk profile of patients with previously unknown carriage of methicillin-resistant Staphylococcus aureus (MRSA) at hospital admission. SUBJECTS AND METHODS: We conducted a 7-month, prospective case-controlled study in adult inpatients admitted to a university hospital with endemic MRSA. Multivariate conditional logistic regression for data sets matched 1:4 was performed to identify the risk profile of newly identified MRSA carriers. RESULTS: Overall, 399 of 12072 screened admissions (prevalence, 3.3%) were found colonized (n = 368, 92%) or infected (n = 31, 8%) with MRSA. In 204 cases (prevalence, 1.7%), MRSA carriage was newly identified. Without screening on admission, 49% (196/399) of MRSA carriers would have been missed. We identified nine independent risk factors for newly identified MRSA carriage at admission (adjusted odds ratio): male sex (1.9); age greater than 75 years (2.0); receipt of fluoroquinolones (2.7), cephalosporins (2.1), and carbapenems (3.2) in the last 6 months; previous hospitalization (1.9) or intravenous therapy (1.7) during the last 12 months; urinary catheter at admission (2.0); and intrahospital transfer (2.4). A risk score (range, 0-13) was calculated by adding points assigned to these variables. On the basis of analysis of 1006 patients included in the case-controlled study, the probability of MRSA carriage was 8% (28/342) in patients with a low score (< or =1), 19% (92/482) in patients with an intermediate score (2-4), and 46% (84/182) in patients with a high score (> or =5). The risk score had good discrimination (c-statistic, 0.73) and showed excellent calibration (P =.88). CONCLUSIONS: On-admission prevalence of previously unknown MRSA carriers was high. Applying the risk score to newly admitted patients with an intermediate or high probability of MRSA carriage could allow a more effective MRSA control strategy.
Keywords AgedCarrier State/ diagnosis/epidemiologyCase-Control StudiesCross Infection/epidemiology/ prevention & controlFemaleHospitalizationHumansMaleMethicillin ResistancePredictive Value of TestsPrevalenceProbabilityRisk FactorsStaphylococcal Infections/ epidemiology/transmissionSwitzerland/epidemiology
Identifiers
PMID: 16490475
Full text
Article - document accessible for UNIGE members only Limited access to UNIGE
Structures
Research groups Epidémiologie et contrôle de la résistance aux antibiotiques (866)
Staphylocoques dorés résistants à la méthicilline et hygiène hospitalière (330)
Citation
(ISO format)
HARBARTH, Stéphan Juergen et al. Evaluating the probability of previously unknown carriage of MRSA at hospital admission. In: The American journal of medicine, 2006, vol. 119, n° 3, p. 275 e215-223. doi: 10.1016/j.amjmed.2005.04.042 https://archive-ouverte.unige.ch/unige:7306

432 hits

0 download

Update

Deposited on : 2010-06-21

Export document
Format :
Citation style :