Evaluation of Sampling Methods for Bacillus Spore-Contaminated HVAC Filters.
Calfee, W., L. Rose, J. Tufts, S. Morse, C. Matt, T. Dahman, N. Griffin-Gatchalian, C. Slone, AND N. McSweeney. Evaluation of Sampling Methods for Bacillus Spore-Contaminated HVAC Filters. Letters in Applied Microbiology. Blackwell Publishing, Malden, MA, 96:1-5, (2014).
Following a wide area release of biological materials, mapping the extent of contamination is essential for orderly response and decontamination operations. HVAC filters process large volumes of air and therefore collect highly representative particulate samples in buildings. HVAC filter extraction may have great utility in rapidly estimating the extent of building contamination following a large-scale incident. However, until now, no studies have been conducted comparing the two most appropriate sampling approaches for HVAC filter materials: direct extraction and vacuum-based sampling.