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BACTERIA ASSOCIATED WITH BLENDED MELON (Citrullus colocynthis L.)
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Table of contents
CHAPTER ONE: INTRODUCTION 1
1.1 Background to the Study 1
1.2 Significance of the Study 2
1.3 Aim and Objectives of the Study 2
1.3.1 Aim 2
1.3.2 Objectives of the Study 3
CHAPTER TWO: LITERATURE REVIEW 4
2.1 Melon (Citrullus colocynthis) 4
2.2 Chemical Constituents of Egusi 8
2.3 Toxicity of Egusi 10
2.4 Microbial Spoilage of Egusi and Egusi Products 11
2.5 Importance and Uses of Melon 14
2.6 Antimicrobial Activities of Egusi 16
CHAPTER THREE: MATERIALS AND METHODS 18
3.1 Study Area 18
3.2 Sample Collection 18
3.3 Materials Used 18
3.3.1 Media 18
3.3.2 Chemicals 18
3.3.3 Equipment 18
3.4 Isolation of Microorganisms 18
3.4.1 Isolation of Pure 19
3.5 Characterization of Microorganisms 19
3.5.1 Gram Staining 19
3.5.2 Biochemical tests 20
3.6 Antibiotic Susceptibility Testing 21
3.6.1 Preparation of Inoculum 21
CHAPTER FOUR: RESULT 23
Table 4.1: Total Microbial Count (cfu/ml) of Egusi Samples 23
Table 4.2: Morphological Characteristics of Bacteria Isolated from Egusi Samples 24
Table 4.3: Biochemical Characteristics of Bacteria Isolated from Egusi Samples 25
Table 4.4: Antibiotic Sensitivity Pattern of Gram Negative Bacterial Isolated from Egusi
Samples 26
Table 4.5: Antibiotic Sensitivity Pattern of Gram Positive Bacterial Isolated from Egusi
Samples 27
CHAPTER FIVE: DISCUSSION, CONCLUSION AND RECOMMENDATIONS 28
5.1 Discussion 28
5.2 Conclusion and Recommendations 28
References 30
Abstract
The aim of this study was to analyse the microbial activities of egusi and determine their susceptibility to selected antibiotics. Grinded enugi melon used for the study were collected from 10 different retailers in New Market, Ijebu-Ode, Ogun State, Nigeria and processed for microbiological analysis. The microbial count ranged from 2.0 x 102 to 5.8 x 106. The isolated bacteria were Klebsiella pneumonae, Escherichia coli, Salmonella typhi, Staphylococcus epidermis and Pseudomonas aeruginosa. Three bacteria isolates, Salmonella typhi, Pseudomonas aureginosa, Klebsiella pneumoniae were sensitive to Augmentin, Gentamycin, Pefloxacin, Tarivid. Streptomycin, Septrin, Chloramphenicol, Sparfloxacin, Ciprofloxacin and Amoxacillin. However, Escherichia coli was sensitive to Gentamycin, Chloramphenicol, Sparfloxacin and Ciprofloxacin. Staphylococcus epidermis was sensitive to all the antibiotics while Staphylococcus aureus was sensitive to only ciprofloxacin and gentamycin. The presence of pathogenic bacteria might be due to pre-harvest or post-harvest processing or an indication of poor hygienic practices during production. Though, most of the bacteria isolated from melon samples were sensitive to test antibiotics, there is need for proper hygiene practice in the pre-harvest and post-harvest production of melon. Also, consumer should maintain good hygiene practice when preparing melon as food condiment.
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