[Identification and typing of yeast isolates from hospital patients in Mexico City]

Area of Science:

• Medical Mycology
• Infectious Diseases
• Hospital Epidemiology

Background:

• Nosocomial (hospital-acquired) yeast infections pose a serious threat, increasing morbidity and mortality in vulnerable patient populations.
• Understanding the epidemiology of yeast pathogens is crucial for effective infection control and treatment strategies in healthcare settings.

Purpose of the Study:

• To determine the frequency and distribution of yeast species isolated from various biological samples in a Mexico City hospital over a one-year period.
• To identify common yeast morphotypes and serotypes causing nosocomial infections.

Main Methods:

• Prospective collection of yeast isolates from diverse biological specimens (e.g., blood, urine, sputum) from hospitalized patients.
• Identification of yeast species using standard microbiological techniques.
• Morphological and serological characterization of the isolated yeasts.

Main Results:

• Candida albicans was the predominant yeast species, identified in 72.3% of cases.
• Other frequently isolated species included Candida glabrata (13.4%) and Candida parapsilosis (8%).
• Twenty distinct morphotypes were observed, with serotype B being the most prevalent (79%).

Conclusions:

• Candida albicans is the primary cause of nosocomial yeast infections in the studied population.
• The high prevalence of specific morphotypes and serotypes may inform targeted diagnostic and therapeutic approaches.
• Continued surveillance of yeast epidemiology is essential for managing hospital-acquired fungal infections.