Fungal Contamination of Automobile Air Conditioner System with Reference to Aqueous Extract Effect of Dodonaea viscosa on Aspergillus fumigatus

One of the indoor environments where people spend a lot of time these days is public and private transportation, and there is more and more attention to explaining the correlation between human health and indoor air quality in transportation. The present investigation aims to identify the fungus species in car cooling dispensers and quantify the antifungal efficacy of an aqueous crude extract derived from Dodonaea viscosa leaves and seeds against Aspergillus flavus. Fifty swab samples were obtained in 8 h and then they were cultivated on Sabourad’s dextrose agar medium. The emerging fungi were Aspergillus spp., Penicillium spp., Cladosporium spp., Ulocladum spp., Alternaria spp., and white and black mycelia. The occurrence, frequency, and importance value index were counted. The predominant isolate was A. fumigatus (importance value index = 36.2). In vitro, fungal growth suppression was evaluated using the hot water extract of D. viscosa seeds and leaves. 20% and 40% (w/v) concentrations were made. The results showed that seed extract (40%) presented the highest activity against the predominant isolate Aspergillus fumigatus.