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Risk factors for mortality in patients with Stenotrophomonas maltophilia bacteremia and clinical impact of quinolone-resistant strains

 Eun Jin Kim  ;  Yong Chan Kim  ;  Jin Young Ahn  ;  Su Jin Jeong  ;  Nam Su Ku  ;  Jun Yong Choi  ;  Joon-Sup Yeom  ;  Young Goo Song 
 BMC Infectious Diseases, Vol.19(1) : 754, 2019 
Journal Title
Issue Date
Bacteremia ; Quinolone-resistant strains ; Stenotrophomonas maltophilia
BACKGROUND: Stenotrophomonas maltophilia is an important nosocomial pathogen. This pathogen has intrinsic or acquired resistance to a number of antibiotics classes. Furthermore, Stenotrophomonas infections have been associated with high mortality, mainly in immunocompromised patients. Accordingly, we conducted a retrospective cohort study on the clinical data, microbiological characteristics, and outcomes of patients with S. maltophilia (SM) bacteremia.

METHODS: A retrospective cohort study was conducted at two tertiary care referral hospitals in Seoul, South Korea. Data were collected between January 2006 and December 2015 from electric medical records. Our analysis aimed to identify the risk factors associated with crude mortality, as well as the predictive factors of quinolone-resistant strains in SM bacteremia patients.

RESULTS: A total of 126 bacteremia patients were enrolled in the study. The mortality rate was 65.1%. On multivariable analysis, hypoalbuminemia (odds ratio [OR], 5.090; 95% confidence interval [CI], 1.321-19.621; P = 0.018), hematologic malignancy (OR, 35.567; 95% CI, 2.517-502.515; P = 0.008) and quinolone-resistant strains (OR, 7.785; 95% CI, 1.278-47.432; P = 0.026) were independent risk factors for mortality. Alternatively, usage of an empirical regimen with quinolone (OR, 0.172; 95% CI, 0.034-0.875; P = 0.034) was an independent protective factor for mortality. The multivariable analysis of predictive factors revealed that high Charlson comorbidity index (OR, 1.190; 95% CI, 1.040-1.361; P = 0.011) and indwelling of a central venous catheter (CVC) (OR, 3.303; 95% CI, 1.194-9.139; P = 0.021) were independent predisposing factors associated with quinolone-resistant strains in SM bacteremia patients.

CONCLUSIONS: Our findings suggest that a high Charlson comorbidity score and indwelling of a CVC were significantly independent predictors of quinolone-resistant strains in SM bacteremia patients. Therefore, we need to carefully consider the antibiotic use in SM bacteremia patients with these predictive factors.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Ku, Nam Su(구남수) ORCID logo https://orcid.org/0000-0002-9717-4327
Song, Young Goo(송영구) ORCID logo https://orcid.org/0000-0002-0733-4156
Ahn, Jin Young(안진영) ORCID logo https://orcid.org/0000-0002-3740-2826
Yeom, Joon Sup(염준섭) ORCID logo https://orcid.org/0000-0001-8940-7170
Jeong, Su Jin(정수진) ORCID logo https://orcid.org/0000-0003-4025-4542
Choi, Jun Yong(최준용) ORCID logo https://orcid.org/0000-0002-2775-3315
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