Saccharomyces cerevisiae infection: an unusual pathogen in the ICU

Area of Science:

• Medical Mycology
• Infectious Diseases
• Critical Care Medicine

Background:

• Mixed fungal yeast infections, particularly in intensive care units (ICUs), are associated with high mortality rates.
• Saccharomyces cerevisiae, commonly used in food production, can act as an opportunistic pathogen.
• Candida albicans is a well-recognized cause of invasive fungal infections.

Purpose of the Study:

• To describe a rare case of mixed Saccharomyces cerevisiae and Candida albicans infection in an ICU patient.
• To discuss the clinical presentation and implications of invasive yeast infections in critically ill patients.
• To highlight the challenges in diagnosing and managing emergent fungal pathogens in intensive care settings.

Main Methods:

• Blood cultures were performed for a patient admitted to the ICU.
• Yeast identification was conducted on positive blood cultures.
• Clinical data and patient history were reviewed.

Main Results:

• The patient presented with diarrhea, progressing to septic shock.
• Blood cultures identified a mixed infection with Saccharomyces cerevisiae and Candida albicans.
• The patient had a history of chronic pulmonary obstructive disease, was an elderly smoker, and had untreated bladder neoplasm.

Conclusions:

• Mixed yeast infections in the ICU setting carry a significant risk of mortality.
• This case underscores the importance of considering atypical pathogens in critically ill patients with unusual presentations.
• Prompt identification and management of invasive fungal infections are crucial in intensive care.