[Invasive yeast infections in neutropenic patients]

Area of Science:

• Medical Mycology
• Hematology
• Infectious Diseases

Background:

• Invasive fungal diseases (IFDs) significantly contribute to morbidity and mortality in neutropenic patients with hematological malignancies.
• While antifungal prophylaxis has reduced overall invasive candidiasis, non-Candida albicans Candida species are increasingly prevalent.
• Uncommon yeasts like Malassezia, Rhodotorula, Trichosporon, and Saprochaete are causing more invasive infections.

Purpose of the Study:

• To highlight the evolving landscape of yeast IFDs in immunocompromised patients.
• To underscore the challenges posed by emerging resistant fungal pathogens.
• To emphasize the continued high mortality associated with these infections.

Main Methods:

• Review of current epidemiological data on IFDs in neutropenic patients.
• Analysis of trends in Candida species distribution.
• Identification of emerging yeast pathogens and their resistance patterns.

Main Results:

• Decreased incidence of overall invasive candidiasis due to prophylaxis.
• Increased relative incidence of non-Candida albicans Candida species.
• Rising occurrence of infections by uncommon yeasts (Malassezia, Rhodotorula, Trichosporon, Saprochaete).
• These uncommon yeasts exhibit resistance to echinocandins and are associated with poor prognosis.

Conclusions:

• Despite advances in prophylaxis, invasive yeast infections remain a critical concern in neutropenic patients.
• The shift towards non-albicans Candida species and the emergence of resistant uncommon yeasts necessitate updated treatment strategies.
• High mortality rates persist, underscoring the need for improved diagnostics and therapeutics for IFDs.