Infection control measures to prevent invasive mould diseases in hematopoietic stem cell transplant recipients

Area of Science:

• Medical Mycology
• Infectious Diseases
• Hematology

Background:

• Invasive mould diseases, especially aspergillosis, significantly increase morbidity and mortality in allogeneic stem cell transplant (SCT) recipients.
• Mould spores are widespread environmental contaminants, posing a constant risk to immunocompromised patients.

Purpose of the Study:

• To review current strategies for preventing mould spore exposure in SCT recipients.
• To evaluate the effectiveness and limitations of existing infection control guidelines.
• To propose an optimal approach for preventing invasive mould diseases in this vulnerable population.

Main Methods:

• Review of existing guidelines from authoritative organizations like the Centers for Disease Control (CDC).
• Analysis of recommendations for environmental controls, including protected environments and HEPA filtration.
• Consideration of challenges in managing outpatient SCT recipients and differentiating infection sources.

Main Results:

• Current guidelines for reducing mould spore exposure are based on consensus and limited data.
• Implementing inpatient-style protected environments is often not feasible for outpatient SCT recipients.
• Distinguishing community-acquired from nosocomial aspergillosis is difficult without identified environmental sources.

Conclusions:

• Adherence to infection control guidelines, despite limitations, is essential.
• Targeted antifungal prophylaxis for high-risk SCT recipients is a key component of prevention.
• A combined strategy of infection control and prophylaxis offers the most effective approach to prevent invasive mould diseases.