Investigation of Indoor and Outdoor Fungal Bioaerosols and Environmental Factors in Indoor Air Quality of Nursery Schools

International Journal of Molecular and Clinical Microbiology

دوره 12، شماره 1، شهریور 2022، صفحه 1596-1604   

نوع مقاله: Research Article

نویسندگان

Zahra Saadati¹؛ Taher Shahryari²؛ Fatemeh Sahlabadi³؛ Abbas Ali Ramazani⁴؛ Fatemeh Nikoomanesh¹؛ Mohammad Hasan Namaie^{* 5}

¹Birjand University of Medical Sciences, Birjand, Iran.

²Department of Environmental Health Engineering, Birjand University of Medical Sciences, Birjand, Iran

³Student Research Committee, Shahid BeheshtiUniversity of Medical Sciences, Thran, Iran

⁴Determinants of health research center, Department of epidemiology and biostatistics, Birjand Universityof Medical Sciences, Birjand, Iran

⁵Infectious Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran

چکیده

Bioaerosols are airborne particles that contain bacteria, viruses, and fungi. Human reactions to bioaerosols are very different. This study attempted to determine indoor and outdoor fungal density in nursery schools in Birjand city and compares the relationship between air fungus density and particulate matter (PM) with mean temperature and relative humidity (RH) in three seasons: Fall, Winter, and Spring. This cross-sectional study was conducted in six nursery schools within a period of 2017-2018. Bioaerosols sampling from the indoor and outdoor air was performed by air-trapping method (28.3 L/min) for 35 min, collected in Sabouraud dextrose agar medium. The air temperature and relative humidity (RH) were measured. The mean temperature of indoor and outdoor was 23.49±4.259 and 20.87±5.57, and the relative humidity of 36.04±12.86 and 22.4±7, respectively. The most isolated fungal species was Penicillium spp. There is a difference between the dispersal of fungi and suspended particles and the humidity of the two environments (p=0.001). Moreover, there is only a difference in the distribution of fungi in fall (p=0.035). Generally, the contamination of indoor is linked to a load of outdoor airborne fungal spores. It can be safely concluded that bioaerosol has outdoor sources and ventilation plays an important role in improving the quality of the indoor air.

کلیدواژه‌ها

Bioaerosol؛ Mycoflora؛ Indoor air؛ Outdoor air؛ Particulate Matter