The measurement of ambient bioaerosol exposure
Monitoring of ambient bioaerosol concentrations through the characterization of outdoor particulate matter (PM) has only been performed on a limited basis in North Carolina (NC) and was the goal of this research. Ambient samples of PM2.5 (fine) and PM10-2.5 (coarse) were collected for a six-month period and analyzed for mold, endotoxins and protein. PM2.5 and PM10-2.5 concentrations of these bioaerosols were reported as a function of PM mass, as well as volume of air sampled. The mass of PM2.5 was almost twice that of the PM10-2.5; however, the protein and endotoxin masses were greater in the coarse than the fine PM indicating an enrichment in the coarse PM. The protein and mold results demonstrated a seasonal pattern, both being higher in the summer than in the winter. Except for an occasional excursion, the endotoxin data remained fairly constant throughout the six months of the study.
Menetrez, M. Y., Foarde, K., Esch, R., Dean, T. R., Betancourt, D. A., Moore, S. A., ... Yeatts, K. (2007). The measurement of ambient bioaerosol exposure. Aerosol Science and Technology, 41(9), 884-893. DOI: 10.1080/02786820701523083