Identification of Bacteria and Fungi Contamination of Some Classrooms at Srinakharinwirot University, Ongkharak Campus

Abstract

The air quality of air inside the classroom is an important factor effect to health of people. The objective of the study was to estimation the air quality and identification of bacteria and fungi contamination in the air inside the classroom at Srinakharinwirot University Ongkharak Campus. The open plate technique was used to collect samples in the morning at 8.30 a.m. (before students enter to the classroom) and in the afternoon at 4.30 p.m. (after students left the classroom) between November 2018 to April 2019. The result showed that the average amounts of bacteria and fungi were 67.60 to 352.50 and 69.60 to 370.80 CFU/dm2/h, respectively. The evaluations of the index of microbial air contamination (IMA) were fair to very poor. However, the concentrations of airborne bacteria and fungi were not higher than the proposed air quality index. Therefore, the air quality of classrooms had a good hygienic standard. The most isolated bacteria were Enterobacter spp., Escherichia coli, Staphylococcus spp., Bacillus spp., and Pseudomonas spp. and fungi were found to include Cladosporium spp., Aspergillus spp., Penicillium citrinum and Neurospora crassa. So, the air quality of air inside classroom control management is appropriate to be used to reduce bacteria and fungi contamination in the classroom.Â