Abstract
Infections and especially blood stream infections (BSI) with gram-negative bacteria (GNB) represent a major threat for patients with hematological diseases undergoing chemotherapy and mainly contribute to morbidity and mortality. In this retrospective single-center study, we analyzed the impact of BSI with different gram-negative multidrug-resistant bacteria (MDRGN) compared to BSI with antibiotic susceptible gram-negative bacteria. Data of 109 patients with hematological malignancies and GNB BSI were analyzed with overall survival (OS) 30 days after BSI being the primary endpoint. BSI with non-fermentative gram-negative bacteria were found in 26.6% of all patients and 73.4% suffered from a BSI with an Enterobacteriaceae. Thirty-two of 109 patients suffered from BSI with MDRGN. Characteristics of MDRGN and non-MDRGN BSI patients did not differ besides the fact that significantly more patients received an immunosuppressive therapy in the MDRGN BSI group. OS (30 days after BSI) of patients with MDRGN BSI was significantly lower (85.6 vs. 55.9%; p < 0.001) compared to patients with non-MDRGN BSI. Patients with MDRGN BSI with non-fermentative pathogens had a worse OS after 30 days compared to MDRGN BSI with Enterobacteriaceae and the same holds true for non-MDRGN BSI. In multivariate analysis of MDRGN BSI, non-fermenters and ICU admission were independently associated with increased 30-day mortality. Our data demonstrate the negative impact of non-fermentative gram-negative pathogens causing BSI compared to Enterobacteriaceae in hematological patients and thereby underlining the heterogeneity of gram-negative BSI.
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Acknowledgements
The authors thank all technicians and physicians involved in pre-transplant procedures, allo-HSCT and care of patients as an outpatient. The work of VAJK was supported by a grant of the Deutsche Forschungsgemeninschaft (DFG Research Unit 2251).
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SS and BS designed the study. SS and SW collected data. SS, SW, CR, TAW, MH, VAJK, JK, HS and BS interpreted the data. SS, BS and SW wrote the manuscript. All authors read and approved the final version of the manuscript.
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Scheich, S., Weber, S., Reinheimer, C. et al. Bloodstream infections with gram-negative organisms and the impact of multidrug resistance in patients with hematological malignancies. Ann Hematol 97, 2225–2234 (2018). https://doi.org/10.1007/s00277-018-3423-5
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DOI: https://doi.org/10.1007/s00277-018-3423-5