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MICROBIAL AIR-SPORA OF MICROBIOLOGY LABORATORY COMPARED WITH THE CHEMISTRY LABORATORY ON CAMPUS
Categories
Table of contents
CHAPTER ONE: Introduction 1
1.1 Background to the Study 1
1.2 Objective of the Study 4
1.3 Justification of the Study 4
CHAPTER TWO: Literature Review 6
2.1 Microbes in Indoor Environments 6
2.2 Moisture Damage and Microbes 9
2.2.1 Microbial Growth on Building Materials 10
2.2.3 Effects of Remediation on Microbial Indoor Environment Quality 13
CHAPTER THREE: Materials and Methods 15
3.0 Study Area 15
3.1 Sample Collection 15
3.3 Materials and Media Used 15
3.3.1 Instrument and glass wares 15
3.3.2 Media Used 16
3.3.3 Method of Sterilization 16
3.4 Culture Method 17
3.4.1 Isolation of Bacterial and Fungal 17
3.5 Biochemical method of Identification of Bacteria 17
3.5.1 Characterization of Bacterial Isolate 17
CHAPTER FOUR: Results 22
4.1 Total Coliform Count 23
4.2 Total Aerobic Plate Count 23
CHAPTER FIVE 30
5.1 Discussion 30
5.2 Conclusion 32
5.3 Recommendations 32
REFERENCES 34
LIST OF TABLES
Table Title Page
4.1 Microbial Load of the Air from Laboratory of Collection 22
4.2 Total Coliform count for Chemistry Laboratory and
Microbiology Laboratory of Olabisi Onabanjo University 24
4.3 Total Aerobic Plate Count for Chemistry Laboratory and
Microbiology Laboratory of Olabisi Onabanjo University 25
4.4 Cultural Characteristics of Bacterial Isolate 26
4.5 Biochemical Reaction of Bacterial organisms Isolated
from Laboratory 27
4.6 Bacteria Isolated from the Laboratories 28
4.7 Characteristics of Fungal Isolates 29
Abstract
The airborne microbial concentrations of two laboratories located in the main campus of Olabisi Onabanjo University (OOU) were investigated within a period of two weeks. The total aerobic plate counts and total coliform count were determined by the spread plate method on Nutrient and Potato Dextrose Agar respectively.
The Total Coliform count obtained from the samples ranged from 2.0 x 106 to 2.8 x 106 cfu/ml for Chemistry laboratory and 1.0 x 104 to 3.2 x 104 cfu/ml for Microbiology laboratory. Also total aerobic count obtained from the samples ranged from 4.3 x 104 to 9.0 x 106 cfu/ml for Chemistry laboratory and 3.2 x 106 to 5.6 x 106 cfu/ml for Microbiology laboratory.
The microorganisms isolated were identified microscopically and by biochemical tests. The bacteria includes Bacillus spp., Straphylococcus spp., Klebsiella spp., Micrococcus leteus and Streptococcus spp. The fungal includes Epidermophyton spp., aspergillus niger and Penicillium spp.
The study revealed that there is microbial load in both laboratories that were study. This comparative information could be useful for the school authority, laboratory instructors and public health practitioners on common airborne bacteria and fungi, and their roles in the indoor air quality of laboratories.
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