VIRUSES & BACTERIABeth Walker

CP Biology

VIRUSES

A. What are the basic characteristics of viruses?smaller than bacterianon-livingonly 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 bodyStep #2: Immune System fights off the

virus and leaves memory cells behindStep #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 DNAsmall & simplehelpful & harmfulcell walls of peptidoglycan

BACTERIA

BACTERIA - TUBERCULOSIS

Mycobacterium tuberculosis

BACTERIA – STREP THROAT

Streptococcus pyogenes

BACTERIA – STAPH INEFCTION

Staphylococcus aureus

BACTERIA – LYME DISEASE

Borrelia burgdorferi