Nature of infectious diseases
Infectious diseases /communicable diseases - caused by organisms that enter and live within the human body
Bacteria
Viruses
Fungi
Protozoans
Other pathogens
Causes of Infectious Diseases *pathogens - disease-causing agents <ul><li>Bacteria --------toxins  ex. tetanus </li></ul><...
Spread of Infectious diseases contact with an infected person
Spread of infectious diseases contact with contaminated object
Spread of Infectious Diseases contact with an animal
Spread of Infectious diseases contact with environmental sources
Body ’ s Lines of Defense Against Pathogens  <ul><li>Physical, chemical barriers </li></ul><ul><li>inflammation </li></ul>...
Body ’ s First Line of Defense Against Infection <ul><li>physical barriers </li></ul><ul><li>chemical barriers </li></ul><...
Body ’ s Second line of Defense Against Infection
Inflammation
Inflammation
Inflammation
Body ’ s Third line of defense Against Infection
Immune System
 
Development of Infectious diseases
EXPOSURE Incubation Period multiply Prodromal Period first symptoms Acute Stage most severe symptoms Recovery Stage sympto...
Nature of noninfectious diseases/ noncommunicable diseases <ul><li>CARDIOVASCULAR DISEASES </li></ul><ul><li>high blood pr...
Noninfectious Diseases <ul><li>ARTHRITIS (osteo-, rheumatoid-) </li></ul><ul><li>DISABILITIES (sight, hearing, mobility) <...
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Nature of diseases

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Describes infectious and noninfectious diseases

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Nature of diseases

  1. 1. Nature of infectious diseases
  2. 2. Infectious diseases /communicable diseases - caused by organisms that enter and live within the human body
  3. 3. Bacteria
  4. 4. Viruses
  5. 5. Fungi
  6. 6. Protozoans
  7. 7. Other pathogens
  8. 8. Causes of Infectious Diseases *pathogens - disease-causing agents <ul><li>Bacteria --------toxins ex. tetanus </li></ul><ul><li>Viruses ex. influenza </li></ul><ul><li>Fungi ex. Athlete ’ s foot </li></ul><ul><li>Protozoan ex. malaria </li></ul><ul><li>other pathogens -----mites, worms, lice </li></ul>
  9. 9. Spread of Infectious diseases contact with an infected person
  10. 10. Spread of infectious diseases contact with contaminated object
  11. 11. Spread of Infectious Diseases contact with an animal
  12. 12. Spread of Infectious diseases contact with environmental sources
  13. 13. Body ’ s Lines of Defense Against Pathogens <ul><li>Physical, chemical barriers </li></ul><ul><li>inflammation </li></ul><ul><li>immune system </li></ul>
  14. 14. Body ’ s First Line of Defense Against Infection <ul><li>physical barriers </li></ul><ul><li>chemical barriers </li></ul><ul><li>action barriers </li></ul>
  15. 15. Body ’ s Second line of Defense Against Infection
  16. 16. Inflammation
  17. 17. Inflammation
  18. 18. Inflammation
  19. 19. Body ’ s Third line of defense Against Infection
  20. 20. Immune System
  21. 22. Development of Infectious diseases
  22. 23. EXPOSURE Incubation Period multiply Prodromal Period first symptoms Acute Stage most severe symptoms Recovery Stage symptoms diminishing Convalescence relapse is possible I M M U N I T Y disease is contagious
  23. 24. Nature of noninfectious diseases/ noncommunicable diseases <ul><li>CARDIOVASCULAR DISEASES </li></ul><ul><li>high blood pressure </li></ul><ul><li>atherosclerosis </li></ul><ul><li>heart attack </li></ul><ul><li>arrhythmia </li></ul><ul><li>stroke </li></ul><ul><li>CANCER (skin, lung, oral, colon and rectal, breast, reproductive, blood) </li></ul><ul><li>DIABETES (Type 1 and Type II) </li></ul>
  24. 25. Noninfectious Diseases <ul><li>ARTHRITIS (osteo-, rheumatoid-) </li></ul><ul><li>DISABILITIES (sight, hearing, mobility) </li></ul>

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