Which of the following is a valid method to sample bioaerosols in BEA?

• A. Active air sampling with culture media or PCR.
• B. Infrared spectroscopy of air.
• C. Measuring humidity only.
• D. Passive sampling without culture.

Answer: (A)

Sampling bioaerosols effectively requires actively pulling a known volume of air and concentrating any microorganisms for analysis. Active air sampling does this by drawing air through a sampler that collects organisms onto culture media or into a sample suitable for PCR, giving you tangible results you can quantify or identify. If you want to know how many viable organisms are present, culture-based methods yield colony counts (often expressed as CFU per cubic meter). If you need rapid detection or want to find organisms regardless of viability, PCR analyzes the genetic material collected, which can be faster and more sensitive. In contrast, infrared spectroscopy isn’t specific to biological agents, humidity measurements don’t sample organisms, and passive sampling without culture doesn’t reliably provide quantification or identification for bioaerosols.