Characteristic and antibiotic resistance of bioaerosols between ambient atmosphere and semi-open night market

This study analyzed bacterial features, biodiversity, human-associated bacteria (HAB), and antibiotic resistance in bioaerosols from the ambient atmosphere and a semi-open outdoor night market in Taiwan during the summer. The analysis indicated that the dominant airborne bacteria in the samples were Gram-positive bacteria. Staphylococcus spp. is consistently present across various sample sizes in most rounds. Visitor numbers correlated with bacterial antibiotic resistance, multidrug resistance, and bioaerosol concentration. Ambient temperature and relative humidity were associated with increased bioaerosol concentrations. These results showed that both human activity and environmental factors contributed to the characteristics of bioaerosols.