Transcript Rainbow Curves - CORE Charter FFA and Agriculture Program

Pathogens . . .
They’ve Gone Viral !!!
Part Two
Applied Ag Biology
Page 1
HIV vs. AIDS
• HIV: Human immunodeficiency
virus; causes AIDS
• AIDS: Acquired
immunodeficiency syndrome;
disease in which a person is
unable to defend his/her body
vs. infections
Page 2
More About HIV
• HIV-infected people don’t
develop AIDS symptoms until
years after infection
• HIV-infected individuals can feel
healthy yet still spread virus to
others
Page 3
How is HIV Spread?
• Body fluids (semen, vaginal
fluid) through sexual contact
• Blood (sharing of needles)
• Transmitted to infants during
pregnancy or through breast
milk
Page 4
How HIV Defeats Immune System
• In healthy people, immune
system attacks & destroys
invaders (bacteria, virus-infected
cell, cancer)
• In AIDS patients, immune system
is infected & destroyed by HIV
• Body is unable to defend itself
• AIDS patients usually die of
infections that a healthy person
would normally resist
Page 5
Real Life Connection:
• As of 2005, 1.2 million
Americans were HIV positive.
• As of Dec 2008, 184,4209
Californians reported
contracting HIV. Of those,
85,958 have died from AIDS.
Page 6