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Article

Pseudomonas aeruginosa bacteremia: resistance to antibiotics, risk factors, and patient mortality

1
Department of Laboratory Medicine, Kaunas University of Medicine
2
Department of Anesthesiology, Kaunas University of Medicine
3
Department of Pulmonology and Immunology, Kaunas University of Medicine, Lithuania
*
Author to whom correspondence should be addressed.
Received: 1 September 2009 / Accepted: 8 July 2010 / Published: 13 July 2010
The aim of our study was to determine the prevalence of Pseudomonas aeruginosa bacteremia, risk factors, and outcome of patients treated at the Hospital of Kaunas University of Medicine.
Material and methods
. All hospitalized patients with blood culture positive for Pseudomonas aeruginosa during the 5-year period were included. A retrospective data analysis was performed to evaluate patients’ risk factors and mortality caused by P. aeruginosa bacteremia.
Results
. A total of 47 (58.8%) bacteremia episodes occurred in an intensive care unit (ICU). A primary source of bacteremia was identified in 50 (62.5%) episodes. Overall mortality rate was 58.8%. Univariate risk factors analysis showed the factors, which significantly increased the risk of death: mechanical ventilation (13.67 times, P<0.001), patient hospitalization in the ICU (8.51 times, P<0.001), acute respiratory failure (8.44 times, P<0.001), infection site in the respiratory tract (4.93 times, P=0.003), and central vein catheter (4.44 times, P=0.002). Timely and appropriate treatment and surgery were significant protective factors for 30-day mortality (11.1 and 5.26 times, respectively; P=0.001). Meropenem-resistant Pseudomonas aeruginosa strains caused bacteremia more frequently in patients older than 65 years than meropenem-sensitive strains (57.9%, n=11). All 19 patients with meropenem-resistant Pseudomonas aeruginosa bacteremia received inappropriate empirical antibiotic therapy.
Conclusions
. Treatment at the intensive care unit, mechanical ventilation, acute respiratory failure, source of infection in respiratory tract, and central vein catheter are the major risk factors associated with an increased mortality rate in patients with Pseudomonas aeruginosa bacteremia. The patients older than 65 years are at increased risk for bacteremia caused by carbapenemresistant Pseudomonas aeruginosa strains. Carbapenems are not antibiotics of the choice of treatment for Pseudomonas aeruginosa bacteremia at the Hospital of Kaunas University of Medicine.
Keywords: Pseudomonas aeruginosa; bacteremia; risk factors Pseudomonas aeruginosa; bacteremia; risk factors
MDPI and ACS Style

Vitkauskienė, A.; Skrodenienė, E.; Dambrauskienė, A.; Macas, A.; Sakalauskas, R. Pseudomonas aeruginosa bacteremia: resistance to antibiotics, risk factors, and patient mortality. Medicina 2010, 46, 490. https://0-doi-org.brum.beds.ac.uk/10.3390/medicina46070071

AMA Style

Vitkauskienė A, Skrodenienė E, Dambrauskienė A, Macas A, Sakalauskas R. Pseudomonas aeruginosa bacteremia: resistance to antibiotics, risk factors, and patient mortality. Medicina. 2010; 46(7):490. https://0-doi-org.brum.beds.ac.uk/10.3390/medicina46070071

Chicago/Turabian Style

Vitkauskienė, Astra, Erika Skrodenienė, Asta Dambrauskienė, Andrius Macas, and Raimundas Sakalauskas. 2010. "Pseudomonas aeruginosa bacteremia: resistance to antibiotics, risk factors, and patient mortality" Medicina 46, no. 7: 490. https://0-doi-org.brum.beds.ac.uk/10.3390/medicina46070071

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