Introduction: Introduction: Halotolerant fungi in the air produce a large number of industerial enzymes. Some of these fungi cause deadly opportunistic infections in humans. The purpose of this research is screening of fungi in the air of indoor and outdoor environments in Tehran
Methods: Methods: Air samplers, SAS Super DUO 360 were used for air sampling . 500 samples were
taken from 44 sites in 11 geographical areas of Tehran during 2018 to 2019. The plates were incubated at 28° C for 2 to 4 weeks. The fungi colonies were purified and identified according to microscopic and genetic methods.
Results: The results: A total of 3596 colonies belonging to 15 fungal species were isolated. Of the city's central areas (8,9,10) 15 (25.33%) , northwestern region(5)9(12.60%), the northeastern region (4) 10 (15.7%), northern areas (3,2,1) 15 (24.24%) and southern areas (15,20, 22) 13 (22/02%)fungi were isolated. Airborne fungi have been identified in four groups: Hyaline saprophytes (63/75 ٪), dematiaceous saprophytes (33/69%), zygomycetes (8/50%) and Unidentifiable sterile mycelium (1.2%) . Aspergillus (31.31%), Cladosporium (21.30 %), Penicillium (17.15 ٪), Alternaria (11.32 %), Mucor (3.94%), Rhizopus (3.64٪), Fusarium ( 3.22%), Monilia (3/01%), Trichoderma (1.33%), Scopulariopsis (1.27%), Basidiobolus (0.92%), Chrysosporium (0.66%), Chaetomium (0.55%), Nigrospora ( 0.52%), Purpureocillium (0.30%) are identified genera and theirThe phylogenetic tree was also drawn.
Conclusion: Conclusion: The results show that outdoor air, can be a major source of pollution in indoor environments and providing a pattern for the spread of these fungi can help to reduce the risk of fatal opportunistic infections and allergic diseases.