VIRUSES & BACTERIA Beth Walker CP Biology.

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Presentation transcript:

VIRUSES & BACTERIA Beth Walker CP Biology

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

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

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

VIRUSES - HIV

VIRUSES – Smallpox

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

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

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

BACTERIA

BACTERIA - Tuberculosis Mycobacterium tuberculosis

Bacteria – Strep throat Streptococcus pyogenes

BACTERIA – Staph inefction Staphylococcus aureus

BACTERIA – LYME DISEASE Borrelia burgdorferi