1. VIRUSES & BACTERIA
Beth Walker
CP Biology

2. VIRUSES A. What are the basic characteristics of viruses?
smaller than bacteria
non-living
only reproduce in a host cell

3. VIRUSES made up of DNA core & protein coat
cannot be treated with antibiotics

4. VIRUSES B. Examples HIV (Human Immunodeficiency Virus) – cause AIDS
Influenza – the “flu”
Variola causes smallpox – only virus ever eradicated from the Earth

5. VIRUSES - HIV

6. VIRUSES – Smallpox

7. VIRUSES C. Vaccination 1. Process 
Step #1: Small amount of live/dead virus particle is injected into the body
Step #2: Immune System fights off the virus and leaves memory cells behind
Step #3: Memory cells with “remember” the virus and fight it off before it makes you sick again, if you come in contact with the virus a second time

8. VIRUSES
Vaccine “Idea”  Edward Jenner; vaccinated his son against smallpox with cowpox in the 1800’s
Polio Vaccine – invented by Jonas Salk

9. BACTERIA A. What are the basic characteristics of bacteria?
prokaryotic cell (no membrane-bound organelles)
circular DNA
small & simple
helpful & harmful
cell walls of peptidoglycan

10. BACTERIA

11. BACTERIA - Tuberculosis
Mycobacterium tuberculosis

12. Bacteria – Strep throat
Streptococcus pyogenes

13. BACTERIA – Staph inefction
Staphylococcus aureus

14. BACTERIA – LYME DISEASE
Borrelia burgdorferi