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. 2023 May 23;23(1):344.
doi: 10.1186/s12879-023-08329-2.

Effect of appropriate empirical antimicrobial therapy on mortality of patients with Gram-negative bloodstream infections: a retrospective cohort study

Shanshan Xu  1 , Zhihui Song  1 , Furong Han  1 , Chao Zhang  2   3
Affiliations

Effect of appropriate empirical antimicrobial therapy on mortality of patients with Gram-negative bloodstream infections: a retrospective cohort study

Shanshan Xu et al. BMC Infect Dis. .

Abstract

Background: Little evidence exists regarding the prevalence of pathogens in bloodstream infections (BSIs), the mortality risk, and the benefit of combination therapy over monotherapy. This study aims to describe patterns of empiric antimicrobial therapy, and the epidemiology of Gram-negative pathogens, and to investigate the effect of appropriate therapy and appropriate combination therapy on the mortality of patients with BSIs.

Methods: This was a retrospective cohort study including all patients with BSIs of Gram-negative pathogens from January 2017 to December 2022 in a Chinese general hospital. The in-hospital mortality was compared between appropriate and inappropriate therapy, and between monotherapy and combination therapy for patients receiving appropriate therapy. We used Cox regression analysis to identify factors independently associated with in-hospital mortality.

Results: We included 205 patients in the study, of whom 147 (71.71%) patients received appropriate therapy compared with 58 (28.29%) who received inappropriate therapy. The most common Gram-negative pathogen was Escherichia coli (37.56%). 131 (63.90%) patients received monotherapy and 74 (36.10%) patients received combination therapy. The in-hospital mortality was significantly lower in patients administered appropriate therapy than inappropriate therapy (16.33% vs. 48.28%, p = 0.004); adjusted hazard ratio [HR] 0.55 [95% CI 0.35-0.84], p = 0.006). In-hospital mortality was also not different in combination therapy and monotherapy in the multivariate Cox regression analyses (adjusted HR 0.42 [95% CI 0.15-1.17], p = 0.096). However, combination therapy was associated with lower mortality than monotherapy in patients with sepsis or septic shock (adjusted HR 0.94 [95% CI 0.86-1.02], p = 0.047).

Conclusions: Appropriate therapy was associated with a protective effect on mortality among patients with BSIs due to Gram-negative pathogens. Combination therapy was associated with improved survival in patients with sepsis or septic shock. Clinicians need to choose optical empirical antimicrobials to improve survival outcomes in patients with BSIs.

Keywords: Appropriate empirical antimicrobial therapy; Bloodstream infections; Mortality.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Flow chart of included patients with bloodstream infections
Fig. 2
Fig. 2
Adjusted Hazards of in-hospital death associated with appropriate empirical antimicrobial therapy by pathogen
See this image and copyright information in PMC

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References

    1. Holmbom M, Giske CG, Fredrikson M, et al. 14-Year survey in a swedish county reveals a pronounced increase in bloodstream infections (BSI). Comorbidity - an independent risk factor for both BSI and mortality. PLoS ONE. 2016;11:e0166527. doi: 10.1371/journal.pone.0166527. - DOI - PMC - PubMed
    1. Kontula KSK, Skogberg K, Ollgren J, et al. Population-based study of bloodstream infection incidence and mortality rates, Finland, 2004–2018. Emerg Infect Dis. 2021;27:256–9. doi: 10.3201/eid2710.204826. - DOI - PMC - PubMed
    1. Verway M, Brown KA, Marchand-Austin A, et al. Prevalence and Mortality Associated with Bloodstream Organisms: a Population-Wide retrospective cohort study. J Clin Microbiol. 2022;60:e0242921. doi: 10.1128/jcm.02429-21. - DOI - PMC - PubMed
    1. Marquet K, Liesenborgs A, Bergs J, et al. Incidence and outcome of inappropriate in-hospital empiric antibiotics for severe infection: a systematic review and meta-analysis. Crit Care. 2015;19:63. doi: 10.1186/s13054-015-0795-y. - DOI - PMC - PubMed
    1. Seymour CW, Gesten F, Prescott HC, et al. Time to treatment and mortality during mandated emergency care for sepsis. N Engl J Med. 2017;376:2235–44. doi: 10.1056/NEJMoa1703058. - DOI - PMC - PubMed

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