Contemporary culture-based methods used to detect bioaerosols require time-consuming and expensive
off-line laboratory analysis. In addition, these methods considerably underestimate exposures to airborne
microorganisms (Miller et al., 1999) that may have serious implications for risk assessment
investigations. The development of fast, culture-independent methods is believed to have capacity to
improve the efficiency and accuracy of bioaerosol detection. In this work, a commercially available
Ultraviolet Aerodynamic Particle Sizer (UV-APS) spectrometer (TSI, Model 3312A) was used to measure
size distribution and concentration of both biological and total particles inside the swine housing and at
several outdoor locations. This paper reports the results of the measurements.