1. VIRUSES Nature’s Robots

3. General Characteristics
Non-Living
Contain strand of genetic material: DNA/RNA
Encased in a Protein Coat: Capsid
Have structures for attachment to a host cell
CAROUSEL

4. 2 1 2 1 3 3

5. Cannot make proteins
Require a vector; can’t move by themselves: air, water, blood, body fluids, other organisms
Smallest disease causing pathogen
Cannot replicate themselves, so are called:
obligate intracellular parasites
Are a mechanism for transferring DNA/RNA to cells: Good for genetic treatments, bad can cause some cancers
Many shapes: spheres, hexagons, spirals, etc.

6. Viral Replication COLDS FLU HPV: WARTS MEASLES GENITAL HERPES
ASSEMBLY TRIGGERED
BY TRAUMA, OR
IMMUME DECLINE
ATTACHMENT
RELEASE
ENTRY
AS CELL REPLICATES SO IS
THE VIRAL DNA, RESULTS IN
MILLIONS OF CELLS WITH
‘HIDDEN’ VIRAL DNA
ASSEMBLY
COLDS
FLU
MEASLES
CHICKEN POX
HPV: WARTS
GENITAL HERPES
SHINGLES
COLD SORES
REPLICATION
VIRAL DNA INCORPORATES
GOES DORMANT

7. IMMUNITY
SHORT TERM
LONG TERM

8. IMMUNITY NATURAL ACTIVE IMMUNITY ARTIFICIAL ACTIVE IMMUNITY
Person is exposed to live pathogen
Develops the disease
Immune system produces antibodies to fight infection
Antibodies remain after viruses are destroyed
Immune response is induced by introduction of a vaccine
Vaccine contains viral genetic signature
Antibodies produced without infection