• 1. Department of Infection Control, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China;
  • 2. Department of Infection Control, West China Tianfu Hospital, Sichuan University, Chengdu, Sichuan 610200, P. R. China;
  • 3. Intensive Care Unit, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China;
  • 4. Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China;
ZONG Zhiyong, Email: zongzhiy@scu.edu.cn
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Objective  To investigate the predictors for carbapenem-resistant Acinetobacter baumannii, Enterobacteriaceae and Pseudomonas aeruginosa (CR-AEP) as the pathogens of bloodstream infection (BSI) for intensive care unit (ICU) patients. Methods  A retrospective case-control study based on ICU- healthcare-associated infection (HAI) research database was carried out. The patients who have been admitted to the central ICU between 2015 and 2019 in the ICU-HAI research database of West China Hospital of Sichuan University were selected. The included patients were divided into two groups, of which the patients with ICU-acquired BSI due to CR-AEP were the case group and the patients with BSI due to the pathogens other than CR-AEP were the control group. The clinical features of the two groups of patients were compared. Logistic regression model was used to identify the predictors of BSI due to CR-AEP.Results A total of 197 patients with BSI were included, including 83 cases in the case group and 114 cases in the control group. A total of 214 strains of pathogenic bacteria were isolated from the 197 BSI cases, including 86 CR-AEP strains. The results of multivariate logistic regression analysis showed that previous use of tigecycline [odds ratio (OR)=2.490, 95% confidence interval (CI) (1.141, 5.436), P=0.022] was associated with higher possibility for CR-AEP as the pathogens of BSI in ICU patients with BSI, while previous use of antipseudomonal penicillin [OR=0.497, 95%CI (0.256, 0.964), P=0.039] was associated with lower possibility for that. Conclusion  Previous use of tigecycline or antipseudomonal penicillin is the predictor for CR-AEP as the pathogens of BSI in ICU patients with BSI.

Citation: ZHU Shichao, YIN Weijia, ZHANG Hui, LI Jingwen, CAI Lin, DENG Yuhua, ZONG Zhiyong. Predictors for carbapenem-resistant bacteria as the pathogens of bloodstream infections. West China Medical Journal, 2023, 38(3): 346-351. doi: 10.7507/1002-0179.202302089 Copy

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