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INDOOR AIR QUALITY OF SELECTED LABORATORIES IN THE FACULTY OF SCIENCE, OLABISI ONABANJO UNIVERSITY, AGO -IWOYE
Categories
Table of contents
CHAPTER ONE 1
1.1 Introduction 1
1.2 Aim of the Study 4
1.3 Objectives of the Study 4
CHAPTER TWO: Literature Review 5
2.1 Antibiotic Resistance 5
2.2 Prevalence of Bacteria and Fungi in Indoor Environment 8
2.3 Bioaerosol and Transmission of Diseases 11
2.4 Sources of Airborne Bacteria and Fungi 12
CHAPTER THREE: Materials and Methods 14
3.0 Study Area 14
3.1 Collection of Samples 14
3.2 Instrument and glass wares 14
3.3 Media Used 14
3.4 Method of Sterilization 15
3.5 Isolation of Microorganisms 15
3.6 Characterization of Bacterial Isolates 15
3.6.1 Gram's Staining Reaction 16
3.6.2 Catalase 16
3.6.3 Oxidase Test 16
3.6.4 Indole Test 16
3.6.5 Citrate Test 17
3.6.6 Coagulase Test 17
3.6.7 Sugar Fermentation Test 17
3.7 Identification of Fungi 18
3.8 Antibiotic Susceptibility Testing for Bacterial Isolates 18
3.8.1 Preparation of Inoculum 18
CHAPTER FOUR: Results 20
CHAPTER FIVE: Discussion, Conclusion and Recommendations 28
5.1 Discussion 28
5.2 Conclusion 30
5.3 Recommendations 31
References 32
LIST OF TABLES
TABLE TITLE PAGES
4.1 Total Viable Count of Bacteria Isolated From Laboratories in OOU 21
4.2 Morphological Characteristics of Bacteria Isolated from Olabisi Onabanjo
University Laboratories 22
4.3 Biochemical Characterization of Bacteria Isolated from Olabisi Onabanjo University Laboratories 24
4.4 Cultural and Morphological Characteristics of Fungi identified in the major
laboratories of the Faculty of Science, Olabisi Onabanjo University 25
4.5 Zone of Inhibition of Antibiotics Susceptibility Test Performed on the
Isolates (mm) 26
Abstract
Indoor air quality is gaining importance in residential sector whilst it is the need of hours to assess indoor air quality in school laboratories with respect to indoor air microflora because of the infection that can be transmitted through air. The study is therefore aimed at the isolation and characterization of aerosolic bacteria and fungi from different laboratory environments in the Faculty of Science, Olabisi Onabanjo University, Ago-Iwoye. The air sample was collected by exposing prepared solidified nutrient agar and potato dextrose agar for the enumeration and isolation of bacteria and fungi respectively. The total bacteria counts were reported as the number of CFU per cubic meter. The bacteria counts of air samples ranged from 6 to 144 cfu/m3. Bacteria isolated from the laboratories were Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus subtilis and Micrococcus luteus. Fungi isolated were Aspergillus niger, Aspergillus nidulans and Rhizophores stolonifera. Out of the thirty bacteria isolated in this study, fifty-three (53%) were susceptible to Septrin, followed by Ciprofloxacin and Streptomycin with 47%, Erythromycin and Pefloxacin with 40%, Gentamycin with 23%. The organisms were least susceptible to Ampiclox, Zinnacef and Amoxicillin with 10% each. Hence, proper disinfection practice, working under a standard sterile condition, quality monitoring of air and maintenance of devices that can transmit bioaerosol across different locations are highly recommended.
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