PhD, University of Cincinnati, 2022, Medicine: Industrial Hygiene (Environmental Health)
Home healthcare workers (HHCWs) are exposed to numerous hazards within the patient's residence. These workers have no control over residential workplace hazards such as safety, chemicals, second-hand smoke, biohazards, and bioaerosols, which are all contingent on a given home and its environmental conditions. Examples of bioaerosols include bacteria, fungi, pollen, and viruses. Currently, there are no occupational health and safety regulations for HHCWs employed in patient homes; however, such provisions are published for healthcare settings such as hospitals. Unfortunately, exposure assessment is challenging due to the nature of HHCWs job duties as well as cross-contamination, cost, and instrument operation requirements. Therefore, the development of a practical approach to collect and interpret data to predict and prevent bioaerosol exposures to HHCWs is required. This dissertation aimed at understanding how home healthcare workers are exposed to bioaerosols and what types of bioaerosols are present within a residence during everyday activities. Bioaerosol concentrations were measured in different ventilation, spatial, and temporal conditions using a novel technology: a fluorescence-based direct-reading instrument (InstaScope, DetectionTek, Boulder, CO, USA).
The effect of seven activities of daily living (bedsheet changing, cooking, dusting, showering, sleeping, vacuuming, and walking) on bioaerosol generation was studied. Higher concentrations of pollen and fungi were consistently measured compared to bacteria. Further, the concentrations of fluorescent particles were higher than non-fluorescent particles. Showering, cooking, and bedsheet changing experiments were found to have increased bioaerosol concentrations compared to dusting, sleeping, vacuuming, and walking. Next, PM10 and PM2.5, both categorized as total and biological particles, were investigated. The objective was to characterize the spatial and temporal variation of bioaerosol concentrations (open full item for complete abstract)
Committee: Tiina Reponen Ph.D. (Committee Member); Jurate Virkutyte Ph.D. (Committee Member); Marepalli Rao Ph.D. (Committee Member); Kermit Davis Ph.D. (Committee Member)
Subjects: Occupational Health