Microbial Mechanisms of Pathogenicity

Microbial Mechanisms of Pathogenicity. Microbial Mechanisms of Pathogenicity. Pathogenicity The ability to cause disease Virulence The extent of pathogenicity. Portals of Entry. Mucous membranes Skin Parenteral route. Numbers of Invading Microbes.

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Microbial Mechanisms of Pathogenicity

Microbial Mechanisms of Pathogenicity . Dr. Ackman. Definitions. Pathogenicity Ability of a microorganism to cause disease by overcoming the defenses of a host Virulence The degree or extent of pathogenicity . Portals of Entry. Pathogens Must gain access to host Adhere to host tissue

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MICROBIAL MECHANISMS OF PATHOGENICITY.

MICROBIAL MECHANISMS OF PATHOGENICITY. Introduction: How microorganisms enter a host. MECHANISMS OF PATHOGENICITY. PORTALS OF ENTRY. Mucous membranes. Skin. Parenteral Route. The Preferred Portal of Entry. NUMBERS OF INVADING MICROBES.

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Molecular Mechanisms of Microbial Pathogenesis and Virulence

Molecular Mechanisms of Microbial Pathogenesis and Virulence. Controlling Infectious Diseases The pre-antibiotic Era- Improving Sanitation & hygiene education Typhoid ( Salmonella ), Plague ( Yersina pestis ) Syphilis ( Treponema pallidum )

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Chapter 15 Microbial Mechanisms of Pathogenicity

Topic 1: Portals of Entry $100 Question. Which portal of entry is most often used by microorganisms? a. Parenteral routeb. Mucous membranes of the respiratory routec. Mucous membranes of the conjunctivad. Skin. BACK TO GAME. ANSWER. Topic 1: Portals of Entry $100 Answer. Which portal of

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Mechanisms of microbial disease. Schaechter et al, Chapter 9 Burton & Engelkirk Chapter 7. Microbe is Extracellular. Microbe secretes exotoxin Botulinus, tetanus toxin (neurotoxins) Enterotoxins (Cholera toxin, toxigenic E, coli, stimulate adenylate cyclase; Shigella toxin, cytotoxic;

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Chapter 15: Microbial Mechanisms of Pathogenicity

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Mechanisms of Pathogenicity

Mechanisms of Pathogenicity. How do microorganisms cause disease?. Mechanisms of Pathogenicity. The ability to cause disease in a host is called pathogenicity. The degree of pathogenicity is called virulence.

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Microbial Mechanisms of Pathogenicity

Microbial Mechanisms of Pathogenicity. Virulence is the degree of pathogenicity of an organism. Pathogenicity , Ability to cause disease. Portals of entry are usually constant for a microbe. Mucous membranes of conjunctiva, respiratory, gut and genitals

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Chapter 12: Microbial Pathogenicity

Chapter 12: Microbial Pathogenicity. Pathogenicity The ability to cause disease Virulence The extent of pathogenicity. Portals of Entry. Mucous membranes Skin Parenteral route. Numbers of Invading Microbes. ID 50 : Infectious dose for 50% of the test population

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Microbial Mechanisms of Pathogenicity

Microbial Mechanisms of Pathogenicity. Pathogenicity The ability to cause disease Virulence The extent of pathogenicity. Portals of Entry. Mucous membranes Skin Parenteral route. Numbers of Invading Microbes. ID 50 : Infectious dose for 50% of the test population

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Mechanisms of Pathogenicity

Mechanisms of Pathogenicity. Define a Few Words:. Pathogen Pathology Pathologist Pathogenicity Pathogenesis . If a person is exposed to a pathogen, what are some reasons why they might not get sick?. 4 Phases of an Infectious Disease. 1. Incubation Period

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MICROBIAL MECHANISMS OF PATHOGENICITY.

MICROBIAL MECHANISMS OF PATHOGENICITY. Entry of a microorganism into a host. PORTALS OF ENTRY. Mucous Membranes. Skin. Parenteral Route. Preferred portals of entry. Numbers of Invading Microbes. Adherece. HOW MICROBES PENETRATE HOST DEFENSE. Capsules. Components of the cell wall.

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chapter 15 microbial mechanisms of pathogenicity

chapter 15 microbial mechanisms of pathogenicity. pathogenesis. portals of entry & exit. inoculation vs. disease. preferred portal of entry entry DOES NOT EQUAL disease ID 50 : infectious dose for 50% of test population LD 50 : lethal dose for 50% of test population.

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Microbial Mechanisms of Pathogenicity

Microbial Mechanisms of Pathogenicity. Prof. Khaled H. Abu-Elteen. Infection and Disease. A. Definitions B. Generalized Stages of Infection C. Virulence Factors and Toxins. A. Definitions. Disease and Infectious Disease Disease

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Chapter 15: Microbial Mechanisms of Pathogenicity

Chapter 15: Microbial Mechanisms of Pathogenicity. Microbial Mechanisms of Pathogenicity. Pathogenicity : The ability to cause disease. Factors influencing microbial pathogenicity: Portals of Entry. Portal of entry : route for pathogens to gain entry into host Mucous membranes

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Pathogenicity of Bacteria

Pathogenicity of Bacteria. students.umf.maine.edu. 94,360 cases of MRSA in 2005. slog.thestranger.com. u. 18,650 of which were fatal. Escherichia coli. Campylobacter spp. 76 Million Cases of Food-borne illness every year in the USA. 1.86 billion infected with Mycobacteria tuberculosis.

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Mechanism of Pathogenicity

Mechanism of Pathogenicity. Pathogens & Disease. Pathogens are defined as microbes capable of causing host damage. When host damage reaches a certain threshold, it can manifest itself as a disease.

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Mechanisms of Pathogenicity

Mechanisms of Pathogenicity. Microbiology 2314. Definitions. Pathogenicity The ability of a pathogen to produce a disease by overcoming the defenses of the host. Virulence The degree of pathogenicity Portal of Entry The specific route by which a particular

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Microbial Mechanisms of Pathogenicity

Microbial Mechanisms of Pathogenicity. Pathogenicity - ability to cause disease Virulence - degree of pathogenicity. Many properties that determine a microbe’s pathogenicity or virulence are unclear or unknown But, when a microbe overpowers the hosts defenses, disease results!.

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Microbial Mechanism of Pathogenicity

Microbial Mechanism of Pathogenicity. OUT LINES. MICROBIAL GROWTH MICROBIAL GENETICS PATHOGENIC PROPERITIES OF MICROBES CHAIN OF INFECTION. Objectives:. At the end of this lecture the students will be able to: Understand microbial growth Describe microbial genetics

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Microbial Mechanisms of Pathogenicity

Microbial Mechanisms of Pathogenicity. Virulence is the degree of pathogenicity of an organism. Pathogenicity , Ability to cause disease. Portals of entry are usually constant for a microbe. Mucous membranes of conjunctiva, respiratory, gut and genitals

361 views • 33 slides