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Lecture 17

BIO SCI 1A Lecture Notes - Lecture 17: Planned Parenthood, Encephalitis, Natural Selection

Biological Sciences
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Some Viral Diseases in Humans
Cancer, hepatitis
Warts, fevers, blisters, shingles
Common cold
Measles, chicken pox, small pox
Genital herpes, genital warts, AIDS (HIV)
Chicken Pox
Belongs in the herpes family
DNA virus which goes into the cell nucleus where it will replicate itself and burst out of
the cell
Once you get chicken pox you’ll have it for the rest of your life
o Much like herpes
Disease of children and young adults
Spread by saliva
End of U.S. vaccines -- 1972
Biological weapon of terrorists?
Influenza (Flu)
Reservoir: ducks, chickens, pigs
Importance in Asia, esp. Today
Animal to human transmission
o Mutation to human form
Historically a major killer
Major pandemics or outbreaks: 1918, 1957, 1968
The Spanish Influenza
Occured in 1918
Killed about 50 million people worldwide
But mortality RATE was low compared to Black Death
o But more people than black death
Still, considerable impact on U.S. life expectancy
o More people died from influenza than the civil war
Origin: Africa, in primate populations, specifically monkeys
Modes of transmission
o Sexual
o Unsterilized needle
o Mother to baby
10 times easier for male -> female
Global impact
o Over 1 million people in US who are HIV+
Impact in Africa
HIV Virus
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