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Isolation,Selection and Identification of Antagonistic Marine Bacteria and Safety Assessment for Their Potential Application as Probiotics

Abstract第5-6页
摘要第7-16页
CHAPTER 0第16-31页
    0. Literature Review第16-31页
        0.1. General Introduction第16-18页
            0.1.1. Marine environment diversity第16页
            0.1.2. Microorganism in Marine Environment第16-18页
        0.2. Antagonistic Marine Bacteria第18页
        0.3. Marine Bacteria and Antibiotic Resistance第18-20页
            0.3.1. Antibiotic Resistance Hazards第18-19页
            0.3.2. Marine bacteria as a remedy of microbial resistance第19-20页
        0.4. Structure of Marine Bacterial Antibiotics第20-25页
            0.4.1. Actinobacteria第20-22页
            0.4.2. Pseudoalteromonas spp第22页
            0.4.3. Vibrionaceae第22页
            0.4.4. Firmicutes第22-23页
            0.4.5. Rhodobacteraceae第23页
            0.4.6. Pseudomonas spp第23页
            0.4.7. Cyanobacteria第23-25页
        0.5. Marine Bacteria as Probiotics第25-30页
            0.5.1. Defnition of Probiotics第25-27页
            0.5.2. Selecting and Developing Probiotics第27-28页
            0.5.3. Selection criteria of Probiotics第28页
            0.5.4. Qualified Presumption of Safety (QPS)第28-30页
        0.6. Significance of the study第30页
        0.7. Objectives of the study第30-31页
CHAPTER 1第31-38页
    1. Sampling and Isolation of broad spectrum antagonistic bacteria from marine第31-38页
        1.1. Introduction第31-32页
        1.2. Materials and Methods第32-34页
            1.2.1. Samples collection第32-33页
            1.2.2. Isolation of bacterial flora from marine samples第33页
            1.2.3. Screening of bacterial isolates for Antibacterial activity第33页
            1.2.4. Statistical calculation第33-34页
        1.3. Results第34-36页
        1.4. Discussion第36-37页
        1.5. Conclusion第37-38页
CHAPTER 2第38-50页
    2. Antagonistic potential of marine isolates DK1-SA11 and DK6-SH8第38-50页
        2.1. Introduction第38-39页
        2.2. Materials and Methods第39-42页
            2.2.1. Bacteria第39页
            2.2.2. Identification of marine isolates and phylogeny analysis第39-40页
            2.2.3. Preparation of cell free extract第40页
            2.2.4. Antibacterial activity of CFE第40-41页
            2.2.5. Thermal and proteolytic stability of CFEs第41页
            2.2.6. Effect of pH on CFEs第41页
            2.2.7. Antagonistic activity against fish and shellfish pathogens第41页
            2.2.8. Statistical calculations第41-42页
        2.3. Results第42-47页
            2.3.1. Identification of marine isolates第42-44页
            2.3.2. Antimicrobial activity of CFE第44页
            2.3.3. Thermal, proteolytic and pH stability of CFE第44-46页
            2.3.4. Antagonistic spectrum第46-47页
        2.4. Discussion第47-49页
        2.5. Conclusions第49-50页
CHAPTER 3第50-61页
    3. Phenotypic and genotypic characterization of marine isolate DK1-SA1135第50-61页
        3.1. Introduction第50-51页
        3.2. Materials and Methods第51-53页
            3.2.1. Bacteria第51页
            3.2.2. Microscopic Morphology第51页
            3.2.3. Biotyping第51页
            3.2.4. Genotypic Classification第51-53页
        3.3. Results第53-59页
            3.3.1. Microscopic and Macroscopic Characterization第53页
            3.3.2. Analytical profile index of DK1-SA11第53-57页
            3.3.3. Genotypic Classification第57-59页
        3.4. Discussion第59-60页
        3.5. Conclusions第60-61页
CHAPTER 4第61-76页
    4. Safety and tolerance assessment of marine isolate DK1-SA11 for its putative application as probiotics第61-76页
        4.1. Introduction第61-62页
        4.2. Materials and Methods第62-66页
            4.2.1. Bacterial strains第62-63页
            4.2.2. Animals第63页
            4.2.3. Analysis of enzyme activity第63页
            4.2.4. Acid and Bile tolerance test第63-64页
            4.2.5. Plasmids analysis第64页
            4.2.6. Antibiotic resistance analysis第64页
            4.2.7. Enterotoxin genes第64页
            4.2.8. Enterotoxin detection第64页
            4.2.9. Hemolysis and lecithinase detection第64-65页
            4.2.10. Toxicity study in vivo第65页
            4.2.11. Acute toxicity assay in Danio rerio第65页
            4.2.12. Acute toxicity in mice第65-66页
            4.2.13. Chronic toxicity in mice第66页
            4.2.14. Statistical calculations第66页
        4.3. Results第66-73页
            4.3.1. Semi-quantitative enzymatic activity analysis第66-68页
            4.3.2. Gastrointestinal track tolerance assay第68页
            4.3.3. Antibiotic sensitivity and resistance transfer analysis第68-70页
            4.3.4. Virulence analysis第70页
            4.3.5. Toxicity study in vivo第70-73页
        4.4. Discussion第73-75页
        4.5. Conclusion第75-76页
CHAPTER 5第76-92页
    5. Growth optimization of Marine isolate DK1-SA11第76-92页
        5.1. Introduction第76页
        5.2. Materials and Methods第76-79页
            5.2.1. Bacteria第76-77页
            5.2.2. Growth and production of CFS第77页
            5.2.3. Antimicrobial Activity of CFS第77页
            5.2.4. Selection of growth media第77-78页
            5.2.5. Effect of incubation temperatures, rotation speed, NaCl and pH第78页
            5.2.6. Effect of carbohydrates on antibacterial activity第78-79页
            5.2.7. Effect of Heat shock, cold storage and enzymes treatment on CFS第79页
            5.2.8. Statistical calculations第79页
        5.3. Results第79-89页
            5.3.1. Antimicrobial activity of Cell free suspension第79-80页
            5.3.2. Optimum growth conditions第80-86页
            5.3.3. Effect of Carbohydrates on antimicrobial activity第86页
            5.3.4. Effect of heat shock, cold storage and enzymatic treatments第86-89页
        5.4. Discussion第89-91页
        5.5. Conclusions第91-92页
CHAPTER 6第92-107页
    6. Analysis and compound profiling of strain DK1-SA1177第92-107页
        6.1. Introduction第92-95页
        6.2. Material and Methods第95-99页
            6.2.1. Bacteria第95页
            6.2.2. Growth conditions第95页
            6.2.3. Ethyl acetate extract activity第95-96页
            6.2.4. TLC-Bioautography第96页
            6.2.5. Extraction scheme and compound profiling第96-98页
            6.2.6. Acid Extraction第98页
            6.2.7. HPLC profiling of Extracts第98页
            6.2.8. MALDI-TOF mass spectrometry analysis第98-99页
        6.3. Results第99-105页
            6.3.1. Ethyl acetate extraction and TLC –bioautography第99-101页
            6.3.2. TLC-Bioautography第101-102页
            6.3.3. Classification of Lipopeptides第102-103页
            6.3.4. HPLC profiling of Extracts第103-104页
            6.3.5. Mass Spectrum analysis of lipopeptides第104-105页
        6.4. Discussion第105-106页
        6.5. Conclusion第106-107页
7. References第107-125页
8. Cumulative Conclusion第125-126页
Innovations第126页
Further study第126-127页
Acknowledgement第127-128页
List of Publications第128-130页

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