Risk factors for positive follow-up blood cultures in Gram-negative bacteremia among immunocompromised patients with neutropenia

被引:1
|
作者
Ranganath, Nischal [1 ,2 ]
Yetmar, Zachary A. [1 ]
Saleh, Omar Abu [1 ]
Tande, Aaron J. [1 ]
Shah, Aditya S. [1 ]
机构
[1] Mayo Clin, Div Publ Hlth Infect Dis & Occupat Med, Rochester, MN USA
[2] Mayo Clin, Div Publ Hlth Infect Dis & Occupat Med, 200 1st St SW, Rochester, MN 55905 USA
关键词
bacteremia; follow-up blood cultures; Gram-negative; immunocompromised; neutropenia; CLINICAL-PRACTICE GUIDELINES; INFECTIOUS-DISEASES SOCIETY; AMERICA; UPDATE;
D O I
10.1111/tid.14203
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
IntroductionGram-negative bacillary bloodstream infection (GN-BSI) is a frequent clinical challenge among immunocompromised hosts and is associated with a high mortality. The utility of follow-up blood cultures (FUBCs) for GN-BSI in this population, particularly in the setting of neutropenia, is poorly defined.MethodsWe conducted a single-center, retrospective cohort study between the period of July 2018 and April 2022 to investigate the utility of FUBCs and delineate risk factors for positive cultures among neutropenic patients with monomicrobial GN-BSI. Univariate logistic regression was performed to assess risk factors associated with positive FUBCs.ResultsOf 206 patients, 98% had FUBCs performed, and 9% were positive. Risk factors for positive FUBCs included multidrug-resistant GN infection (OR 3.26; 95% confidence interval [CI] 1.22-8.72) and vascular catheter source (OR 4.82; CI 1.76-13.17). Among patients lacking these risk factors, the prevalence of positive FUBCs was low (2.8%) and the negative predictive value was 92%. Those with positive and negative FUBCs had similar rates of all-cause mortality (16.7% vs. 16.6%; p = .942) and microbiologic relapse (11.1% vs. 6.0%; p = .401) within 90-days of treatment completion. However, positive FUBCs were associated with prolonged hospitalization and longer duration of antimicrobial therapy.ConclusionPositive FUBCs were infrequent in neutropenic patients with GN-BSI, and their occurrence did not significantly impact mortality or microbiologic relapse. Risk factors for positive FUBCs included multidrug resistant Gram-negative infection and vascular catheter source. Prospective studies will be necessary to elucidate the benefits and risks of FUBCs when managing GN-BSI in patients with underlying immune compromise.image Graphical Abstract: In neutropenic patients with monomicrobial Gram-negative bacteremia, 9% of follow-up blood cultures (FUBCs) were positive but did not impact 90-day mortality or microbiologic relapse. Risk factors for persistent bacteremia included vascular catheter source and multi-drug resistant Gram-negative infection. image
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