Document Detail

Screening for resistant gram-negative microorganisms to guide empiric therapy of subsequent infection.
MedLine Citation:
PMID:  18712349     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To define the potential of resistant gram-negative colonization surveillance to predict etiology of subsequent infection and improve adequacy of empiric antimicrobial treatment. DESIGN: Retrospective cohort study. SETTING: A mixed medical-surgical six-bed intensive care unit (ICU), from November 2003 to December 2006. PATIENTS: All patients having at least one episode of ventilator-associated pneumonia (VAP) or bloodstream infection (BSI) caused by a resistant gram-negative pathogen during the study period. INTERVENTIONS: Colonization surveillance of the respiratory tract and gastrointestinal tract was systematically performed in all ICU patients. Tracheal aspirates were obtained twice weekly and rectal swabs once weekly. Both tracheal and rectal samples were cultured in antibiotic-enriched media (containing ceftazidime, ciprofloxacin, imipenem or piperacillin/tazobactam), to focus on resistant gram-negative pathogen isolation. MEASUREMENTS AND RESULTS: Colonization concordance between resistant, gram-negative pathogens of infectious episodes and previous, recent (<or=7 days) colonization of the respiratory and gastrointestinal tract was determined, based on species identity and antimicrobial susceptibility. Concordance was 82% in VAP and 86% in BSI cases and was further confirmed by molecular testing of 15 randomly selected cases by REP-PCR. Previous colonization had high sensitivity and specificity in VAP, but was less specific in BSI cases. Knowledge of previous colonization improved the rate of adequate empiric antimicrobial treatment (91 vs. 40% in VAP and 86 vs. 50% in BSI cases, P < 0.05). CONCLUSIONS: Colonization surveillance for resistant gram-negative microorganisms is predictive of subsequent infection etiology and can improve empiric antimicrobial treatment adequacy in a critical care setting.
Evangelos Papadomichelakis; Flora Kontopidou; Anastasia Antoniadou; Garifalia Poulakou; Evangelos Koratzanis; Petros Kopterides; Irini Mavrou; Apostolos Armaganidis; Helen Giamarellou
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Publication Detail:
Type:  Journal Article     Date:  2008-08-19
Journal Detail:
Title:  Intensive care medicine     Volume:  34     ISSN:  0342-4642     ISO Abbreviation:  Intensive Care Med     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-21     Completed Date:  2009-03-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7704851     Medline TA:  Intensive Care Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2169-75     Citation Subset:  IM    
2nd Critical Care Department, Athens University Medical School, University General Hospital "ATTIKON", Rimini 1, Athens 12462, Greece.
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MeSH Terms
Anti-Bacterial Agents / therapeutic use*
Bacteremia / drug therapy,  microbiology,  prevention & control*
Carrier State
Cohort Studies
Cross Infection / drug therapy,  microbiology,  prevention & control*
Drug Resistance, Multiple, Bacterial*
Gram-Negative Bacteria / drug effects*
Gram-Negative Bacterial Infections / drug therapy,  prevention & control*
Infection Control / methods
Intensive Care Units
Microbial Sensitivity Tests
Pneumonia, Ventilator-Associated / drug therapy,  microbiology,  prevention & control*
Predictive Value of Tests
Retrospective Studies
Sentinel Surveillance
Reg. No./Substance:
0/Anti-Bacterial Agents
Comment In:
Intensive Care Med. 2008 Dec;34(12):2130-3   [PMID:  18712347 ]

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

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