Document Detail

Carriage of methicillin-resistant Staphylococcus aureus, ceftazidime-resistant Gram-negative bacilli, and vancomycin-resistant enterococci before and after intensive care unit admission.
MedLine Citation:
PMID:  12682490     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To measure patients' risk for acquiring antibiotic-resistant microorganisms associated with intensive care unit admission. DESIGN: Prospective, observational study. SETTING: Ten public hospitals including one university medical center. PATIENTS: Consecutive patients admitted to ten intensive care units. INTERVENTIONS: Serial patient surveillance cultures were screened for vancomycin-resistant enterococci, methicillin-resistant Staphylococcus aureus (MRSA), ceftazidime-resistant Gram-negative bacilli (CR-GNB), Acute Physiology and Chronic Health Evaluation II score, and antibiotic and medical device exposures. MEASUREMENTS AND MAIN RESULTS: A total of 1,697 patient admissions in ten intensive care units were enrolled. The overall carriage rate of antibiotic-resistant bacteria at intensive care unit entry was 12.1% for MRSA, 14% for CR-GNB and 4.7% for both. At discharge from the intensive care unit, new carriage of MRSA, CR-GNB, and both was found in 11.1%, 14.2%, and 2.4% of the patients, respectively. The acquisition rates in the individual units correlated highly and positively with proportion of patients with carriage at intensive care unit entry for both MRSA (n = 10, Pearson's r =.89, p < 0.001) and CR-GNB (n = 10, Pearson's r =.92, p < 0.001). By logistic regression, severity of illness (odds ratio, 1.4), length of stay (odds ratio, 1.7), use of penicillins (odds ratio, 1.9), and number of antibiotics (odds ratio, 1.2) and medical devices (odds ratio, 1.2) were independently associated with intensive care unit acquisition of MRSA. In comparison, variables independently associated with intensive care unit acquisition of CR-GNB were Acute Physiology and Chronic Health Evaluation II score (odds ratio, 1.5), number of antibiotics (odds ratio, 1.1), and artificial airway (odds ratio, 1.5). CONCLUSIONS: These data suggest that hospitalization in the intensive care unit introduces significant risk to patients in terms of transmission of MRSA and/or CR-GNB. This risk seems to be influenced strongly by the proportion of patients with colonization at intensive care unit admission and is associated with severity of illness, length of stay, and exposures to antibiotics and medical devices.
Pak-Leung Ho;
Publication Detail:
Type:  Journal Article; Multicenter Study; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Critical care medicine     Volume:  31     ISSN:  0090-3493     ISO Abbreviation:  Crit. Care Med.     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-04-08     Completed Date:  2003-05-01     Revised Date:  2009-06-29    
Medline Journal Info:
Nlm Unique ID:  0355501     Medline TA:  Crit Care Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1175-82     Citation Subset:  AIM; IM    
Centre of Infection and Department of Microbiology, Faculty of Medicine, University of Hong Kong, People's Republic of China.
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MeSH Terms
Carrier State / microbiology*
Ceftazidime / pharmacology
Cephalosporin Resistance
Drug Resistance, Bacterial*
Enterobacteriaceae / drug effects,  isolation & purification
Enterococcus / drug effects,  isolation & purification*
Gram-Negative Bacteria / drug effects,  isolation & purification*
Intensive Care Units*
Length of Stay
Logistic Models
Methicillin Resistance
Middle Aged
Patient Admission
Patient Discharge
Risk Factors
Staphylococcus aureus / drug effects,  isolation & purification*
Vancomycin Resistance
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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