What is a bioaerosol and how can it be monitored in workplace air?

• A. Microorganisms suspended in air; monitor with air samplers and culture/PCR analysis
• B. Dust particles in air; monitor with humidity
• C. Chemical vapors; monitor with gas detectors
• D. Pollen only; monitor by visual inspection

Answer: (A)

Bioaerosols are microorganisms suspended in the air, including bacteria, fungi, and viruses, which can impact indoor air quality and health. To monitor them in workplace air, you collect a known volume of air with an air sampler and capture the microorganisms on a collection medium. The sample is then analyzed—culturing on appropriate media to detect viable organisms, or using PCR to identify specific organisms by their DNA/RNA. This combination provides both presence and, depending on the method, viability information.

Other options don’t fit because humidity doesn’t measure biological content, dust particles refer to non-biological particulates and aren’t a bioaerosol measurement, chemical vapors are detected with gas detectors, and pollen alone isn’t sufficient to characterize the broader range of bioaerosols nor is visual inspection a reliable monitoring method.