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Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
Disease
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Transcript

  • 1. Disease
  • 2. A disease is defined as any change (other than an injury) that interferes with the normal functioning of the body.
    The Germ Theory of Disease states that an infectious disease is caused by a certain agent.
    There are different types of infectious agents which cause specific symptoms from which the disease may be identified.
  • 3. Koch’s postulates is a set of rules that is used to determine whether a specific pathogen is the cause of specific disease.
    There are various ways in which diseases are spread.
    The human body has specific and non-specific mechanisms that defend the organism against infectious diseases
  • 4. Disease
    A pathological condition of a part, organ, or system of an organism
    Infection
    Genetic
    Environmental stress
  • 5. Infectious disease
    Clinically evident illness resulting from the presence of pathogens
    Virus
    Bacteria
    Fungi
    Protozoa
    Parasites
    prions
  • 6. Non-living pathogen
  • 7. Opportunistic pathogen
    Immunosuppressed
  • 8. Infectious disease
    Can be slow or fast when it spreads
    Can be transferred through different vectors
  • 9. Disease vs infection
    Which is which?
    Type of Diseases
    Genetic
    Age
    Infectious
  • 10. Manner of infection
    Entrance to the host body
    Adhere to specific host cells
    Invade and colonize
    Multiply between host cells or body fluids
    Tissue damage
    Production of toxins or destructive enzymes
  • 11. Germ Theory
    Microorganisms can cause diseases
    Infectious disease is caused by an infectious agent
  • 12. Koch’s Postulate
    Series of experimental steps to determine the cause of a disease
  • 13. Koch’s Postulate
    The microorganism must be found in abundance in all organisms suffering from the disease, but should not be found in healthy animals.
    The microorganism must be isolated from a diseased organism and grown in pure culture.
    The cultured microorganism should cause disease when introduced into a healthy organism.
    The microorganism must be reisolated from the inoculated, diseased experimental host and identified as being identical to the original specific causative agent.
  • 14. Koch’s postulate
  • 15. Modes of Infection
    Direct contact
    Indirect contact
    fecal oral route
    Airborne (droplet infection)
    Vector
  • 16. Body Defense
    Non-specific
    Specific
    Humoral
    Cell-mediated
  • 17.
  • 18. Other terms
    Lysosome cilium/cilia
    Mesosome flagellum/flagella
    Piliperoxisome
    Plastid glyoxisome
    Leucoplast/amyloplast
    Chromoplast
    Cytoskeleton
    Microtubule
    microfilament

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