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Clinical Characteristics of Intensive Care Unit Patients with Carbapenem Resistant Acinetobacter Baumannii Isolated from Sputum  

Lee, Sung Won (Department of Internal Medicine, College of Medicine, Kangwon National University and Clinical Research Institute of Kangwon National University Hospital)
Jo, Heui Sug (Department of Preventive Medicine, College of Medicine, Kangwon National University and Clinical Research Institute of Kangwon National University Hospital)
Kim, Woo Jin (Department of Internal Medicine, College of Medicine, Kangwon National University and Clinical Research Institute of Kangwon National University Hospital)
Publication Information
Tuberculosis and Respiratory Diseases / v.60, no.2, 2006 , pp. 228-234 More about this Journal
Abstract
Background : Acinetobacter baumannii is an important pathogen associated with nosocomial infections in intensive care units, and is responsible for nosocomial pneumonia, UTI, bacteremia, etc. The main concern is that this pathogen is often resistant to many antimicrobial agents, particularly to carbapenem. This study compared the clinical those of ICU admitted patients with the carbapenem resistant A. baumannii isolated from the sputum with characteristics of patients with carbapenem sensitive A. baumannii. Methods : A total of 49 patients with A. baumannii from a sputum culture who were admitted to the ICU from January to December 2003 were enrolled in this study. This study evaluated the demographic variables, mortality, APACHE II score, comorbidity, antibiotics used, hospital and ICU stay, Clinical Pulmonary Infection Score, and mechanical ventilation. A retrospective analysis was made by a review of the patients' medical records. Results : Carbapenem sensitive and resistant A. baumannii was isolated from 23 patients and 26 patients respectively. Univariate analysis revealed renal disease, the use of carbapenem and aminoglycoside to be statistically significant factors for carbapenem resistance. Multivariate analysis revealed carbapenem use(p=0.024; OR, 8.17; CI 1.32 to 50.68) to be positively associated with carbapenem resistance, and aminoglycoside use(p=0.026; OR, 0.18; CI, 0.04 to 0.82) to be negatively associated with carbapenem resistance. There was no significant difference in mortality between the carbapenem sensitive and resistant group(30 vs 42%. P=0.39). Conclusion : The occurrence of carbapenem resistant A. baumannii is positively associated with carbapenem use and negatively associated with aminoglycoside use. Carbapenem resistance in the sputum culture did not affect the mortality rate.
Keywords
Acinetobacter baumannii; Drug resistance; Carbapenem;
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