Effect of land use on cultivable bioaerosols in the indoor air of hospital in southeast Iran and its determination of th
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RESEARCH ARTICLE
Effect of land use on cultivable bioaerosols in the indoor air of hospital in southeast Iran and its determination of the affected radius around of hospital Fariba Abbasi 1,2 & Mahrokh Jalili 3,4 & Mohammad Reza Samaei 5 & Ali Mohammad Mokhtari 6 & Elahe Azizi 1,2 Received: 7 February 2020 / Accepted: 3 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This study aimed to evaluate the effect of land use on hospital bioaerosols and determine the effective radius. The concentration of fungi and bacteria in indoor and outdoor air was determined by the 0800NIOSH. Then land uses were determined by Google earth within a range of 0.5–5 km around three hospitals. Data were analyzed by using Spearman correlation, and a t test was used to determine differences between groups. Data were recorded in Excel and entered into Matlab2018 for analysis. The results of the study showed that the concentration of fungi and bacteria was higher in the indoor and outdoor hospital B (bacteria = 343–43, fungi = 106–291 CFU/m3) (P = 0.04). Maximum land use was also found in hospitals A and B related to urban and bare, while in hospital C, they were urban and bare. Mathematical modeling has shown that the trend of land-use variation over different radii consisted of the Gaussian model (in hospital B) and Fourier series (in hospitals A and C). Besides, there was a positive correlation between the bare and fungal and bacterial concentrations. Finally, the most effective bare radius of application on the indoor and outdoor fungi was 4 and 5 km, respectively (R2 = 0.99). The effective radius for reducing fungi and bacteria by creating green space was 0.5 and 3 km from the hospital center (R2fungi = − 0.99, R2bacteria = − 0.8). Based on these results, land use is an effective factor in airborne fungi and bacteria in hospitals. Therefore, their control and management of land use during 5 km is necessary to reduce pollution. Keywords Land use . Indoor and outdoor air . Bacteria . Fungi . Effective radius
Introduction Responsible Editor: Philippe Garrigues * Mohammad Reza Samaei [email protected] 1
Department of Environmental Health Engineering, Shiraz University of Medical Science, Shiraz, Iran
2
Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
3
Environmental Science and Technology Research Center, Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
4
Student Research Committee, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
5
Research Center for Health Sciences, Institute of Health, Department of Environmental Health, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
6
Department of Epidemiology, Shiraz University of Medical Science, Shiraz, Iran
Bioaerosols in the indoor air of hospital buildings are due to factors such as the presence of patients and staff and the sources of contaminants outside the building (Abbasi et al. 2020). External re
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