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MICROORGANISMS ASSOCIATED WITH RETAIL FRUIT SALAD SAMPLE AND THEIR SURVIVAL PROFILE IN COMPOSITE FRUIT EXTRACT
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
1.4 Justification of the Study 5
CHAPTER TWO: Literature Review 7
2.1 Fruit and Fruit Salad 7
2.1.1 Benefits of Fruits 9
2.2 Sources of Contamination of Fruits with Pathogens 10
2.3 Microbiological Food Safety 12
2.4 Bacteria Commonly Associated with Food Poisoning in Fruits 14
2.4.1 Yeasts and Moulds Commonly Associated with Food Poisoning in Fruit
Products 17
2.5 Chemical Contaminants in Foods 19
2.6 Physical Contaminants in Foods 22
CHAPTER THREE: Materials and Methods 24
3.1 collection of samples 24
3.2 Laboratory Analysis 24
3.2.1 Preparation of Materials 24
3.2.2 Media Used 25
3.3 Determination of Microbial Load 25
3.4 Isolation of Microbes 25
3.5 Purification of the Isolates 26
3.6 Identification of Isolates 26
3.6.1 Gram Staining 26
3.7 Biochemical Reaction 27
3.7.1 Catalyse Test 27
3.7.2 Indole Test 27
3.7.3 Coagulase Test 28
3.7.4 Citrate Utilization Test 28
3.7.5 Lactophenol Staining 28
2.8 Processing of Fruit Extract Sample to be Challenged 29
2.8.1 Preparation of Strains Used for Challenge Test 30
2.8.2 Inoculation Strategy and Assessment of Growth 30
3.9 Sensitivity Test 31
3.9.1 Preparation of Inoculum 31
CHAPTER FOUR: Results 33
CHAPTER FIVE: Discussion, Conclusion and Recommendations 41
5.1 Discussion 41
5.2 Conclusion 46
5.3 Recommendations 47
References 48
Appendix 56
LIST OF TABLES
Table Title Page
4.1. pH Levels of Fruit Salad Samples Collected from Three Different
Location 35
4.2 Visual Appearance and Biochemical Characteristics of Isolates
Recovered from Fruit Salad Samples 36
4.3 Colonial, Morphological and Microscopic Features of Fungi Isolated
from Fruit Salad Sample Collected from Three Different Location 37
4.4 Microbial Load of Fruit Salad Samples Collected from Three
Different Locations 38
4.5 Survival of Test of Isolated Bacteria in the Fruit Extracts Samples 39
4.6 Average Zone Inhibition Obtained from Different Antibiotics
Against the Isolates Recovered from Fruit Salad Sample 40
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