Vol. 3, Issue 6 (2017)
Microbiological assessment of indoor air quality of some selected private primary schools in Ilishan-Remo, Ogun state, Nigeria
Author(s): Enitan SS, Ihongbe JC, Ochei JO, Effedua HI, Adeyemi O, Phillips T
Abstract: The aim of this study was to determine the indoor air bacterial and fungal density of some selected private primary schools in Ilishan-Remo of Ogun State at different sampling time of the day using the settle plate method. The outcome of this study shows that regardless of the sampling periods, all the classrooms of the three private schools examined for indoor air microbiological quality were more heavily contaminated with bacteria aerosols than with fungal aerosols, with a mean bacterial and fungal count of: 4378.82 CFU/m3 and 178.93 CFU/m3, respectively. There were no significant differences between the mean bacterial counts of School 1 and School 2 (P>0.05), whereas the mean bacterial counts of school 1 and 2 were significantly higher (P<0.05) than that of School 3. There were no significant differences (P>0.05) in the fungal population density between and within the three schools examined. The levels of pollution with bacterial aerosols recorded in this study range from high to very high, while that of fungal aerosols range from very low to high. Aeroflora isolated include: Staphylococcus aureus, Coagulase negative Staphylococcus species, Micrococcus species and Aerocococcus species, Aspergillus species, Mucor species, Penicillium species, Candida species, Microsporum species, Trichophyton species and Rhizopus species. The concentration of indoor bacterial aerosol observed in this study which was above permissive standard; underscore the importance of this microenvironment for the high exposure of children to bioaerosols.