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Concentration and distribution characteristics of airborne fungi in indoor and outdoor air of Tehran subway stations |
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| Authors: | Mohammad Hoseini Hosein Jabbari Kazem Naddafi Ramin Nabizadeh Mohammad Rahbar Masoud Yunesian Jalil Jaafari |
| Institution: | 1. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran 2. Center for Environmental Research (CER), Iranian Research Center for HIV/AIDS (IRCHA), Digestive Diseases Research Center (DDRC), Tehran University of Medical Sciences, Tehran, Iran 3. Iranian Reference Health Laboratory, Department of Microbiology, Ministry of Health and Medical Education, Tehran, Iran |
| Abstract: | The concentration and distribution characteristics of airborne fungi were investigated in indoor and outdoor air of two metro stations (Imam Khomeini and Sadeghiyeh stations) in Tehran subway. Samples were taken from indoor air at each station from platform and ticket office area also from adjacent outdoor air of each station. Indoor sampling was conducted for two types of trains, old and new. The concentration of airborne fungi ranged from 21 CFU/m3 at the outdoor air of Imam Khomeini station to 1,402 CFU/m3 in the air samples collected from the platform of this station. Results showed that airborne fungi concentrations at indoor air were higher than the outdoor air (p < 0.05), and fungal levels significantly correlated with the number of passengers (p < 0.05; r = 0.68) and RH % (p < 0.05; r = 0.43). Sixteen genera of fungi were isolated in all sampled environments. The predominant genera identified in indoor and outdoor air were Penicillium spp. (34.88 % of total airborne fungi) and Alternaria spp. (29.33 % of total airborne fungi), respectively. The results of this study showed that the indoor air quality in subway is worse than the outdoor air. |
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