Investigation of fungal contamination in indoor air and on surfaces of traditional public baths in a historical city.

It has been proven that exposure to bioaerosols is associated with several health effects, such as pulmonary diseases and allergies. The present cross-sectional study was aimed to investigate fungal contamination in indoor air and on the surfaces of four traditional baths in Shiraz, Iran, one of the most historical cities in the world. Samples were taken from indoor air, using a microbial air sampler, as well as the surfaces of the shower, hallway, and dressing rooms of studied baths for 3 months. Totally 180 samples, including 45 air and 135 surfaces samples, were collected from studied baths. The concentrations of fungi collected from the air of studied baths were ranged from 22.6 to 34.6 CFU/m3. Besides, the levels of fungi collected from the surface samples of studied baths were ranged from 21.2 to 60 CFU/m2. The highest and lowest fungi species detected both in air and surfaces samples of the studied baths were Penicillium spp. and Mucor spp. respectively. Although the levels of fungi in the studied baths were lower than the levels recommended by the World Health Organization, some environmental health measures such as washing and disinfecting surfaces and tools after each working shift and periodic inspections are recommended ensuring the safety of costumers who are visiting such places. © Springer Nature Switzerland AG 2020.