“…In an earlier related study, Nwokedi and Nedosa (1999) also isolated A. niger , A. fumigatus , Chaetomium thermophile , C. globossum , Mucor pusillus , Trichoderma viride , Penicillium digitatum , Rhizopus oligospous and R. stolonifer from deterioration books at the University of Jos. A study carried out in Indonesia recovered 32 species of moulds belonging to Aspergillus , Penicillium , Humicola , Curvularia , Syncephalastrum and Trichoderma (Gandjar et al , 1989). Singh et al (1995) in their study titled “Fungal spores are an important component of library buildings” found the major contributors to library air as Cladosporium , Aspergilli , Penicillia , Alternaria , Drechslera and Curvularia .…”