Fever of Unknown Origin and Multidrug Resistant Organism Colonization in AML Patients

• Published in: Mediterranean journal of hematology and infectious diseases 2023, Vol.15 (1), p.e2023013-e2023013
• Main Authors: Guarnera, Luca, Trotta, Gentiana Elena, Boldrini, Valentina, Cardillo, Lucia, Cerroni, Ilaria, Mezzanotte, Valeria, Pasqualone, Gianmario, Savi, Arianna, Borsellino, Beatrice, Buzzatti, Elisa, Palmieri, Raffaele, Paterno, Giovangiacinto, Maurillo, Luca, Buccisano, Francesco, Venditti, Adriano, Del Principe, Maria Ilaria
• Format: Article
• Language: English
• Subjects: Original
• ISSN: 2035-3006; 2035-3006
• DOI: 10.4084/MJHID.2023.013

Colonization by multidrug-resistant organisms (MDRO) is a frequent complication in hematologic departments, which puts patients at risk of life-threatening bacterial sepsis. Fever of unknown origin (FUO) is a condition related to the delivery of chemotherapy in hematologic malignancies, in which the use of antibiotics is debated. The incidence, risk factors, and influence on the outcome of these conditions in patients with acute myeloid leukemia (AML) are not clearly defined. We retrospectively analyzed 132 consecutive admissions of non-promyelocytic AML patients at the Hematology Unit of the University Tor Vergata in Rome between June 2019 and February 2022. MDRO swab-based screening was performed in all patients on the day of admission and once weekly after that. FUO was defined as fever with no evidence of infection. Of 132 consecutive hospitalizations (69 AML patients), MDRO colonization was observed in 35 cases (26%) and resulted independently related to a previous MDRO colonization (p=0.001) and length of hospitalization (p=0.03). The colonization persistence rate in subsequent admissions was 64%. MDRO-related bloodstream infection was observed in 8 patients (23%) and correlated with grade III/IV mucositis (p=0.008) and length of hospitalization (p=0.02). FUO occurred in 68 cases (51%) and correlated with an absolute neutrophilic count