ABSTRACT
Bioaerosols occur as airborne particles in a size range of approximately 0.02 to 100 µm; thus, different cells, spores, pollen grains, and biological fragments may deposit in all regions of the human airways. Microorganisms, plants, and animals are important components of surface waters and soil. Although not particulate in form, plants and animals release gases and vapors, for example, oxygen, carbon dioxide, methane, and water. Emissions from microorganisms (microbial volatile organic compounds, MVOCs) account for the earthy smell that follows a rain shower or comes from freshly turned garden soil. The distinctive flavors of certain foods and beverages as well as the less pleasant aromas of decay, body odor, and moldy buildings are also volatile microbial metabolites. The complex interactions of MVOCs and bioaerosols with other airborne particles are seldom studied but are likely important for a comprehensive understanding of the effects of biological agents on human health and comfort. It is impossible to cover this broad topic in great depth in a single chapter; therefore, we discuss bioaerosol measurement, dosimetry, and health effects with illustrations and examples from the vast literature on the subject.
