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Principles of Medical Microbiology
Principles of Infectious Disease: The Host-Parasite Relationship Colonization, Normal Microbiota & Symbiotic Relationships Pathogenicity and Virulence Mechanisms of Pathogenicity Epidemiology Mechanisms of Immunity Beneficial Harmful Manipulated Antimicrobial Chemotherapy
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Principles of Infectious Disease
The Host-Parasite Relationship Colonization and Normal Microbiota Permanent residents, transients and opportunists Symbiotic Relationships Mutualism, Commensalism, Parasitism Pathogenicity and Virulence Evolution of parasitism Attenuation of virulence The Infectious Process: 1) Exposure: Oral, respiratory, parenteral, etc 2) Attachment: Pili, capsules, proteins, etc 3) Colonization: Metabolism, replication, avoid clearance 4) Tissue Damage: Toxins, invasiveness, immune response
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Principles of Infectious Disease
The Host-Parasite Relationship Colonization and Normal Microbiota Permanent residents, transients and opportunists Symbiotic Relationships Mutualism, Commensalism, Parasitism Pathogenicity and Virulence Evolution of parasitism Attenuation of virulence The Infectious Process: 1) Exposure: Oral, respiratory, parenteral, etc 2) Attachment: Pili, capsules, proteins, etc 3) Colonization: Metabolism, replication, avoid clearance 4) Tissue Damage: Toxins, invasiveness, immune response
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Colonization
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Normal Microbiota
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Principles of Infectious Disease
The Host-Parasite Relationship Colonization and Normal Microbiota Permanent residents, transients and opportunists Symbiotic Relationships Mutualism, Commensalism, Parasitism Pathogenicity and Virulence -Evolution of parasitism -Attenuation of virulence The Infectious Process: 1) Exposure: Oral, respiratory, parenteral, etc 2) Attachment: Pili, capsules, proteins, etc 3) Colonization: Metabolism, replication, avoidance of immune clearance 4) Tissue Damage: Toxins, invasiveness, adverse immune response
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Routes of Exposure
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Attachment
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Colonization
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Avoiding the Immune Response
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Avoiding the Immune Response
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Tissue Damage: Invasiveness
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Tissue Damage: Invasion
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Tissue Damage: The Action of Exotoxins
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Infectious vs contagious; Chronological sequence;
Epidemiology Reservoirs of Agents Humans, Animals, Inanimate, Nosocomial Transmission of Agents Contact, Vectors, Vehicles Disease Categories Infectious vs contagious; Chronological sequence; Geographical distribution; Incidence rates; Extent of involvement; Agents; Clinical nature
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Nosocomial Infections
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Transmission: How the Microorganisms Spread
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Portals of Entry: How the agents enter the body
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Incidence
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Emerging Diseases
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The Immune System Functions of the Immune System
Types of Immune Responses Organization of the Immune System Innate Defense Mechanisms Acquired Defense Mechanisms Applied Immunology A macrophage
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The Immune System Functions of the Immune System
Defense – Recognition of… Homeostasis – Recognition of… Surveillance – Recognition of… Types of Immune Responses Humoral – Transferred by… Cellular – Transferred by… Innate – First and second line defenses Acquired – “Antigen driven” third line defenses Recognition, Specificity, Memory Organization of the Immune System Innate Defense Mechanisms Acquired Defense Mechanisms Applied Immunology
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Epithelial Barriers
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Chemical Barriers
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The Immune System Functions of the Immune System
Types of Immune Responses Organization of the Immune System Cells: Phagocytes: Neutrophils, macrophages, APC’s Antigen responsive cells: B and T cells Tissues: Primary: Bone marrow, thymus Secondary: Lymph nodes, spleen, diffuse lymphoid tissue Molecules: Enzymes, interferons, complement, interleukins, antibody Innate Defense Mechanisms Acquired Defense Mechanisms Applied Immunology
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Hematopoiesis
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Tissues
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The Immune System Innate Defense Mechanisms Phagocytosis Inflammation
Functions of the Immune System Types of Immune Responses Organization of the Immune System Innate Defense Mechanisms Phagocytosis Inflammation Interferon Complement Acquired Defense Mechanisms Applied Immunology
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Distribution of Phagocytic Cells
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Phagocytosis
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Inflammation
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Interferon
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C’
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The Immune System Acquired Defense Mechanisms
Functions of the Immune System Types of Immune Responses Organization of the Immune System Innate Defense Mechanisms Acquired Defense Mechanisms -Humoral vs cellular specific immunity -The nature of antigens -The nature of antibodies -The functions of antibodies -Clonal selection -Humoral (antibody) immune responses -Cellular immune responses -Natural killer cells Applied Immunology
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Antigens
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Antibodies
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Functions of Antibodies
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Passive Transfer of Antibody
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Clonal Selection
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Antibody Production
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Immunity: -APC’s -Ag Processing -Il-1 Production -Ag Presentation -Th Activation -Il-2 Production -Th Development -Th1 and CMI -Th2 and Antibody -Tc Developement -Tc Killing
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The Immune System Applied Immunology -Methods of acquiring immunity
Functions of the Immune System Types of Immune Responses Organization of the Immune System Innate Defense Mechanisms Acquired Defense Mechanisms Applied Immunology -Methods of acquiring immunity -Vaccination -Immunological-based testing: ELISA assays -Clinical immunology
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Figure 17.1
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Antimicrobial Chemotherapy
History Ancient, Ehrlich, Domagck Terminology Antibiotics, Synthetic antibiotics, Semi-synthetic antibiotics Properties of Antibiotics Selective toxicity, Therapeutic index, Spectrum of activity Adverse Reactions Toxicity, Allergy, Disrupt normal microbiota, Resistance The Ideal Antibiotic Mechanism of Action Bacteria, Viruses, Fungi, Protozoa, Helminths
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