Pseudo-outbreak of Lecanicillium and Acremonium species in orthopedic surgery patients

Area of Science:

• Mycology
• Clinical Microbiology
• Infectious Diseases

Background:

• Acremonium species are known human pathogens, causing various infections.
• Lecanicillium species are typically not associated with human infections.
• Rare fungal isolates can pose diagnostic challenges in clinical settings.

Purpose of the Study:

• To report a pseudo-outbreak involving Acremonium and Lecanicillium species.
• To evaluate the utility and limitations of molecular methods for identifying rare fungal isolates.
• To investigate potential sources of fungal contamination within a hospital environment.

Main Methods:

• Molecular identification techniques were employed for fungal isolate characterization.
• Epidemiological investigation was conducted to trace the source of repeated isolations.
• Environmental sampling may have been performed to assess contamination.

Main Results:

• Both Acremonium and Lecanicillium species were repeatedly isolated from patient tissue samples.
• Molecular methods played a crucial role but also showed limitations in characterizing these rare fungi.
• The findings suggest a potential pseudo-outbreak scenario, possibly linked to hospital contamination.

Conclusions:

• The study highlights the challenges in identifying rare fungal pathogens using molecular techniques.
• Repeated isolation from patients raises concerns about exogenous contamination in healthcare settings.
• Further investigation is warranted to elucidate the source and implications of these fungal findings.