Document Detail

Multiple-drug-resistant bacteria in patients with severe acute exacerbation of chronic obstructive pulmonary disease: Prevalence, risk factors, and outcome.
MedLine Citation:
PMID:  17012911     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine prevalence, risk factors, and effect on outcome of multiple-drug-resistant (MDR) bacteria in patients with severe acute exacerbation of chronic obstructive pulmonary disease. DESIGN: Prospective, observational, cohort study. SETTING: Thirty-bed medical intensive care unit (ICU) in a university hospital. METHODS: All chronic obstructive pulmonary disease patients with acute exacerbation who required intubation and mechanical ventilation for >48 hrs were eligible during a 4-yr period. Patients with pneumonia or other causes of acute respiratory failure were not eligible. In all patients, quantitative tracheal aspirate was performed at ICU admission (positive at 10 colony-forming units [cfu]/mL). MDR bacteria were defined as methicillin-resistant Staphylococcus aureus, ceftazidime- or imipenem-resistant Pseudomonas aeruginosa, Acinetobacter baumannii, Stenotrophomonas maltophilia, and extended-spectrum beta-lactamase-producing Gram-negative bacilli. All patients received empirical antibiotic treatment at ICU admission. Univariate and multivariate analyses were used to determine variables associated with MDR bacteria and variables associated with ICU mortality. RESULTS: A total of 857 patients were included, and 304 bacteria were isolated (>/=10 cfu/mL) in 260 patients (30%), including 75 MDR bacteria (24%) in 69 patients (8%). When patients with MDR bacteria were compared with patients without MDR bacteria, previous antimicrobial treatment (odds ratio [OR], 2.4; 95% confidence interval [95% CI], 1.2-4.7; p = .013) and previous intubation (OR, 31; 95% CI, 12-82; p < .001) were independently associated with MDR bacteria. When patients with bacteria other than MDR or patients with no bacteria were used as a reference group, these risk factors were still independently associated with MDR bacteria. Although ICU mortality rate was higher in patients with MDR bacteria than in patients without MDR bacteria (44% vs. 25%; p = .001; OR, 2.3; 95% CI, 1.4-3.8), MDR bacteria were not independently associated with ICU mortality. Inappropriate initial antibiotic treatment (88% vs. 5%; p = <.001; OR, 6.7; 95% CI, 3.8-12) and ventilator-associated pneumonia (23% vs. 5%; p = <.001; OR, 1.3; 95% CI, 1-1.8) rates were significantly higher in patients with MDR bacteria than in patients with bacteria other than MDR. Inappropriate initial antibiotic treatment was independently associated with increased ICU mortality (OR, 7.1; 95% CI, 1.9-30; p = .003). CONCLUSION: MDR bacteria are common in patients with acute exacerbation of chronic obstructive pulmonary disease requiring intubation and mechanical ventilation. Previous antimicrobial treatment and previous intubation are independent risk factors for MDR bacteria. Although MDR bacteria are not independently associated with ICU mortality, inappropriate initial antibiotic treatment is an independent risk factor for ICU mortality in these patients. Further studies are needed to determine whether broad-spectrum antibiotic treatment is cost-effective in these patients.
Saad Nseir; Christophe Di Pompeo; Béatrice Cavestri; Elsa Jozefowicz; Martine Nyunga; Stéphane Soubrier; Micheline Roussel-Delvallez; Fabienne Saulnier; Daniel Mathieu; Alain Durocher
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Critical care medicine     Volume:  34     ISSN:  0090-3493     ISO Abbreviation:  Crit. Care Med.     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-11-28     Completed Date:  2006-12-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0355501     Medline TA:  Crit Care Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2959-66     Citation Subset:  AIM; IM    
Intensive Care Unit, Calmette Hospital, University Hospital of Lille, Lille, France.
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MeSH Terms
Acute Disease
Anti-Bacterial Agents / administration & dosage,  therapeutic use*
Bacterial Infections / microbiology,  prevention & control*
Cohort Studies
Drug Resistance, Multiple, Bacterial*
Drug Utilization
Hospital Mortality
Hospitals, University
Intensive Care Units
Intubation, Intratracheal / statistics & numerical data
Prospective Studies
Pulmonary Disease, Chronic Obstructive / drug therapy*,  microbiology*
Respiration, Artificial / statistics & numerical data
Risk Factors
Trachea / microbiology*
Treatment Outcome
Reg. No./Substance:
0/Anti-Bacterial Agents
Comment In:
Crit Care Med. 2006 Dec;34(12):3047-8   [PMID:  17130702 ]

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

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