Marijuana smoking and fungal sensitization

Area of Science:

• Mycology
• Immunology
• Pulmonary Medicine

Background:

• Marijuana (MJ) use is prevalent, but potential health risks, particularly from contaminants, are not fully understood.
• Fungal contamination of MJ is a potential source of exposure to allergenic and pathogenic microorganisms.

Purpose of the Study:

• To investigate the role of marijuana smoking in inducing sensitization to Aspergillus organisms.
• To evaluate clinical outcomes and immune responses in MJ smokers exposed to fungi.

Main Methods:

• Clinical evaluation of 28 MJ smokers.
• Identification of fungi in MJ samples.
• Serological testing for precipitins to Aspergillus antigens.
• Assessment of cellular immune response via blastogenesis.
• Air sampling to determine fungal viability after smoking.

Main Results:

• Fungi, including Aspergillus species, were identified in 13 of 14 MJ samples.
• One smoker developed systemic aspergillosis; seven reported bronchospasm after MJ smoking.
• Precipitins to Aspergillus were found in 13 of 23 smokers, indicating immune sensitization.
• Aspergillus fumigatus was viable after passing through smoked MJ cigarettes.

Conclusions:

• Marijuana smoking poses risks of fungal exposure and infection.
• MJ use may induce immunologic lung disorders due to fungal sensitization.
• Smokers are exposed to viable fungi, increasing the risk of respiratory and systemic illness.