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ASSESSMENT OF MICROBIAL LOAD AND SPECTRUM ON SURFACES OF SOME INDIGENOUS KITCHEN UTENSILS
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Table of contents
CHAPTER ONE: INTRODUCTION 1
1.1 Background to the Study 1
1.2 Aim and Objectives 7
1.3 Significance of the Study 7
CHAPTER TWO: LITERATURE REVIEW 8
CHAPTER THREE: MATERIALS AND METHODS 16
3.1 Materials 16
3.1.1 Microorganisms 16
3.1.2 Media 16
3.1.3 Chemicals 16
3.1.4 Equipment 16
3.2 Methods 17
3.2.1 Sample collection 17
3.2.2 Isolation of Microorganisms 17
3.2.3 Characterization and Identification of Biochemical Characteristics 18
3.2.3.1 Gram Staining 18
3.2.3.2 Lactophenol Staining 19
3.2.3.3 Biochemical tests 19
CHAPTER FOUR: RESULTS 20
4.1 Results 20
CHAPTER FIVE: CONCLUSION 28
5.1 Conclusion 28
References 29
LIST OF TABLES
TABLE NUMBER TITLE PAGE
Table 4.1: Microbial counts recovered from household grinding stones samples 21
Table 4.2: Biochemical tests on isolates recovered from household Grinding stones samples 22
Table 4.3: Microbial counts recovered from household Mortars samples 23
Table 4.4: Biochemical Tests on isolates recovered from household mortars samples. 24
Table 4.5: Microbial counts recovered from household pestles samples 25
Table 4.6: Biochemical Tests on isolates recovered from pestles samples 26
Table 4.7: Morphological characterization of fungal isolates 27
Abstract
This study assessed the microbial load and spectrum on the surfaces of indigenous kitchen utensils (pestles, mortars and grinding stones). It also evaluated the rate of contamination of the indigenous kitchen utensils with bacteria, fungi and coliforms.
A total number of 60 samples were collected from surfaces of pestles, mortars and grinding stones by swabbing with sterile swab sticks from different households. The samples were collected before washing and after washing with distilled water. The samples were labelled correctly, packed in a sterile polythene bag and transported to the microbiology laboratory in Olabisi Onabanjo University, for further analysis.
The results showed that bacterial species such as Staphylococcus aureus,Escherichia coli, Klebsiella pnuemoniae, among others and were prevalent on the surfaces of the kitchen utensils.
The presence of these bacterial species could create health hazards when they come in contact with food during preparation and production. Improper handling and poor maintenance of these utensils by members of the households increase the risk of contamination.
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