Disseminated Lomentospora prolificans infection in a neutropenic patient with acute monocytic leukemia: a clinical and diagnostic challenge

September 25, 2025
Clinical Microbiology
Sierra Amaya, Giancarlo Giovannini-Sanguineti, Corina Lopez, Carolyn D Alonso, Stefan Riedel
Pathogen:Lomentospora prolificans
Infection Type:Disseminated fungal infection
Pathogen Type:Fungus

Summary

A neutropenic patient with acute monocytic leukemia presented with disseminated Lomentospora prolificans infection, posing significant diagnostic and therapeutic challenges. The patient's immunocompromised state facilitated the widespread fungal invasion. Diagnosis required careful mycological culture and molecular methods, revealing the pathogen's intrinsic resistance to most antifungal agents. This case highlights the difficulty in managing such infections in vulnerable populations, where rapid identification and appropriate, albeit limited, treatment options are crucial for improving outcomes. The aggressive nature of Lomentospora prolificans in neutropenic patients underscores the need for high clinical suspicion and advanced diagnostic techniques in this setting.

Key note: Early and accurate identification of intrinsically resistant fungal pathogens like Lomentospora prolificans is critical for guiding therapy in immunocompromised patients, despite limited treatment options.

DOI: 10.1128/asmcr.00093-25