Characteristics of oncology patients with fever and invasive bacterial infections diagnosed

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AIM: To describe the characteristics of febrile oncology patients seen in the Paediatric Emergency Department and microbiological characteristics of the invasive bacterial infections (IBIs) diagnosed. METHODS: We conducted a prospective observational study of febrile oncology patients seen between 2016 and 2022. We divided haematologic cancers by the aggressiveness of the chemotherapy received at the time. RESULTS: We included 418 episodes (272 haematologic cancers, 146 solid tumours). The median duration of fever was 2 h (interquartile range: 1-3) and 97.6% of patients were well-appearing on arrival. We diagnosed 61 IBIs (14.6%), including six episodes of bacterial sepsis. One other episode was coded as sepsis without microbiological confirmation, yielding seven episodes overall (1.7%). Rates of IBI and sepsis were higher among patients with high-risk haematologic cancers than those with low-risk haematologic cancers or solid tumours (22.9%, 5.4% and 10.3%, p < 0.01; 3.4%, 0% and 0.7%, p = 0.06, respectively). Leading causes were S. epidermidis (42.6%) and E. coli (14.7%). Gram-positive bacteria caused 67.2% of non-septic IBIs and 50% of septic episodes. CONCLUSION: Most febrile oncology patients are well-appearing and present with a very short history of fever. Prevalence of IBI and sepsis and the main disease-causing bacteria differ by cancer type and the presence of sepsis.

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