The spectrum of Malassezia infections in the bone marrow transplant population

Area of Science:

• Medical Mycology
• Infectious Diseases
• Hematology/Oncology

Background:

• Bone marrow transplantation (BMT) is a complex procedure with a high risk of opportunistic infections.
• Malassezia furfur is a yeast that can cause infections, particularly in immunocompromised individuals.
• Understanding the specific risks and outcomes of Malassezia infections in BMT patients is crucial for patient management.

Purpose of the Study:

• To investigate the incidence and clinical characteristics of Malassezia furfur infections following BMT.
• To identify risk factors associated with Malassezia infections in the BMT population.
• To evaluate the outcomes of Malassezia infections in BMT recipients.

Main Methods:

• Retrospective review of 3044 patients undergoing BMT over a 25-year period at the University of Minnesota.
• Identification of patients who developed Malassezia furfur infections post-transplant.
• Analysis of patient demographics, transplant type, clinical manifestations, risk factors, and outcomes.

Main Results:

• Six patients (0.2% of the cohort) developed Malassezia infections at a median of 59 days post-BMT.
• Infections presented as mucosal, skin, or catheter-related fungemia; neutropenia and broad-spectrum antimicrobials were not significant risk factors.
• Outcomes were generally favorable, with disseminated infection being uncommon, contrasting with other fungal infections in BMT patients.

Conclusions:

• Malassezia furfur infections are rare but can occur in BMT patients, manifesting in various ways.
• Unlike other opportunistic fungi, Malassezia infections in BMT are not strongly associated with neutropenia or broad-spectrum antibiotic use.
• Successful management of Malassezia fungemia involves catheter removal and discontinuation of intravenous lipids, leading to favorable patient outcomes.