Outbreak of Dirkmeia churashimaensis Fungemia in a Neonatal Intensive Care Unit, India

Area of Science:

• Mycology
• Infectious Diseases
• Genomics

Background:

• Bloodstream infections (fungemia) caused by rare or novel fungal species present significant diagnostic and therapeutic challenges.
• Neonatal intensive care units are particularly vulnerable to opportunistic fungal infections.

Purpose of the Study:

• To report and characterize a series of fungemia cases caused by the rare basidiomycete yeast Dirkmeia churashimaensis in neonatal patients.
• To investigate the genetic relatedness of the causative fungal isolates to determine the infection source.

Main Methods:

• Case series reporting clinical data from affected neonatal patients.
• Identification of the fungal pathogen using standard microbiological techniques.
• Whole-genome sequence typing (WGST) to analyze the genetic diversity of the Dirkmeia churashimaensis isolates.

Main Results:

• Multiple cases of fungemia due to Dirkmeia churashimaensis were identified in neonatal patients in India.
• Whole-genome sequence typing revealed that all patient isolates were genetically indistinguishable.
• This genetic homogeneity strongly suggests a single common source for the outbreak.

Conclusions:

• Dirkmeia churashimaensis represents a rare but significant cause of fungemia in neonates.
• The findings highlight the importance of advanced molecular techniques like WGST in identifying outbreak sources.
• Effective infection control measures are crucial to prevent the spread of such rare fungal pathogens in healthcare settings.