Airborne bacteria, fungi, and viruses are known to have adverse effects on human health. Various antimicrobial agents have been used to prohibit the growth of microorganisms on the surfaces of air filter media. In this study, nano-sized silver and copper particles were tested for their antifungal effects on indoor fungi, Cladosporium cladosporioides and Aspergillus versicolor. The growth circle of the fungi was observed on a solid agar plate containing the two nanoparticles. The nanoparticle concentration ranged from 0 to 500 μg/mL. The size of fungal growth circle seemed to decrease with increasing nanoparticle concentration in agar plates, indicating that silver and copper nanoparticles have antifungal properties against C. cladosporioides and A. versicolor.

PDA배지에서 25℃로 배양할 때 초기 균사의 색은 흰색을 띄고 있었으며 배양 후기에 생성되는 포자의 색은 짙은 푸른색을 나타내고 있었다. 시간당 성장률은 1.1mm보다 빠른 것으로 나타났으며 성숙한 포자의 모양은 부드럽고 구형에 가까운 모양이었다. 이러한 형태학적 결과는 시간당 성장률이 0.5-0.7mm 이하인 Tricho-derma viride 및 T. hamatum의 특징과 성숙 포자의 모양이 실린더 모양인 T. koningii,

Trichoderma harzianum is an aggressive causal agent of green mold disease on mushroom cultivation. Some bacterial strains isolated, from oyster mushroom compost in Wonju, were found to have in vitro antifungal activity against Trichoderma harzianum ATCC 6