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Viruses

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Viruses and infectious diseases

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Viruses

  1. 1. VIRUSES
  2. 2. Let’s remember KINGDOMS Animal Plant Fungi Protoctist Monera CHARACTERISTICS Eukaryotic Pluricellular Tissues heterothrophs Eukaryotic Pluricellular Tissues Autotrophs Eukaryotic Pluricellular heterothrophs Eukaryotic Unicellular or pluricellular Prokaryotic Unicellular EXAMPLES
  3. 3. Viruses are different They are not animals
  4. 4. Viruses are different They are not animals They are not plants
  5. 5. Viruses are different They are not animals They are not plants They are not fungi
  6. 6. Viruses are different They are not animals They are not plants They are not fungi They are not protozoa
  7. 7. Viruses are different They are microscopic, as in Monera kingdom, but they are not Moneras They are not animals They are not plants They are not fungi They are not protozoa
  8. 8. What are Viruses? WHY? VIRUS CELL LIVING THING
  9. 9. Let’s remind <ul><li>Vital functions: </li></ul><ul><li>Nutrition </li></ul><ul><li>Interaction </li></ul><ul><li>Reproduction </li></ul>ONLY BY HELP OF OTHER CELLS
  10. 10. Virus Characteristics <ul><li>They are not cells </li></ul><ul><li>They are extremely small (only can be seen through an electron microscope) </li></ul><ul><li>They are unable to move </li></ul><ul><li>They have an extensive habitat (ground, air and water) </li></ul><ul><li>They cannot carry out any vital funtion by themselves, so they infect living cells to carry out the reproduction (obligate parasites). </li></ul>
  11. 11. Parts of a virus NUCLEIC ACID CAPSID * VIRAL ENVELOPE
  12. 12. Infection process 1 2 3 4 The virus enters the cell Reproduction: viruses use the infected cell for making the viral components Assembly of viral components New viruses leave the cell
  13. 13. What are infectious diseases? <ul><li>Pathogenic microorganism </li></ul><ul><ul><li>bacterium </li></ul></ul><ul><ul><li>protozoon </li></ul></ul><ul><ul><li>virus </li></ul></ul><ul><ul><li>fungus </li></ul></ul>Living thing Illness
  14. 14. Steps of Infection 1. Contagion 2. Incubation 3. Illness Period between the invasion and the first symptoms VECTORS?
  15. 15. Fighting against infections Hygiene Vaccines Antibiotics Wash hands before eating Wash fresh fruit and vegetables Weakened, dead or incomplete microorganisms Cannot produce illness Teach the body how to fight against microorganisms Produced by certain bacteria and fungi (also artificially produced) Prevent microorganisms from growing Do not work with viruses
  16. 16. Are all microorganisms harmful? All viruses are pathogenic A few bacteria, protozoa and microscopic fungi as well Antibiotic production Intestinal flora  vitamin production Plankton Decomposers / Producers Food production BENEFITS

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