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Bacteria and Viruses

Bacteria and Viruses. Viruses. VIRUSES ARE NOT ALIVE!!! Viruses are made up of genetic material surrounded by a protein coat ( capsid ). I. Viruses. - Viruses are non-living particles. - They have a nucleic acid core and a protein containing capsid. Viruses.

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Bacteria and Viruses

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  1. Bacteria and Viruses

  2. Viruses • VIRUSES ARE NOT ALIVE!!! • Viruses are made up of genetic material surrounded by a protein coat (capsid).

  3. I. Viruses -Viruses are non-living particles. -They have a nucleic acid core and a protein containing capsid.

  4. Viruses -Viruses need a host cell in order to make more viruses.

  5. Diseases caused by viruses -Many diseases are caused by viruses including: Common cold, flu, chicken pox, warts and HIV.

  6. How can you get a virus? Airborne Contaminated blood products Contaminated food or water Infected Animals or Vectors such as Mosquitoes Sexual contact

  7. II. Bacteria Bacteria are LIVING!!! - Unicellular -Prokaryotic -There are two kinds of bacteria: 1. Archaebacteria-live in extreme environments (ex: hot springs, cold mountains). 2. Bacteria-live everywhere else (ex: our bodies, food).

  8. Bacteria Structure of Bacteria: -All bacteria have a cell wall. -Bacteria are surrounded by a capsule which keeps them from being eaten by white blood cells. -Only bacteria that have capsules are infectious (can cause disease). -

  9. Bacteria

  10. Bacteria shapes Round Rod Spiral

  11. Bacteria -Bacteria are all around us. Not all bacteria cause disease-we have bacteria that live in our stomachs that actually keep us healthy! -Some bacteria do cause diseases such as Strep Throat, pneumonia, diphtheria, cholera and ear infections.

  12. Bacteria -Penicillin an antibiotic kills bacteria by making holes in the cell wall. Water then enters the cell by osmosis, and the cells explode and die.

  13. Antibiotics • Antibiotics kill BACTERIA. • Antibiotics do not kill VIRUSES.

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