2. A tropical disease that is caused by the yellow fever virus.
What is yellow fever?
A tropical disease that is caused by the yellow fever virus.

3. How do you get yellow fever?
The bite of an infected mosquito.
The mosquito injects the yellow fever virus into the victim.
Only female mosquitoes spread yellow fever.
Yellow fever is diagnosed by a blood test.

4. The Enemy
“Aedes aegypti”

5. Stage One (3-6 days after exposure)
Signs & Symptoms
Stage One (3-6 days after exposure)
High fever
Chills
Headache
Muscle aches
Loss of appetite
Nausea
Jaundice (yellowing of eyes and skin)

6. Signs & Symptoms Stage Two: Remission Stage Three: Toxic period
3-4 days
Recovery possible
Stage Three: Toxic period
Vomiting
Bleeding
Hemorrhage
Kidney and liver failure
Delirium, seizures
Heart damage
Coma
Shock
Death

7. Brief History of Yellow Fever, 1793
August, 1793 – prominent citizens and physicians gather in Philadelphia to discus increase in number of patients with nausea, black vomit, lethargy and yellow skin coloration.
Dr. Rush, most prominent physician and signer of the Declaration of Independence, proclaimed the disease yellow fever and advised all “that can move, to quit the city.”

8. + Why did it happen? Wet spring, stagnant pools of H2O
Hot temperatures
Tons of mosquitoes
Refugees with yellow fever fleeing Revolution in Santo Domingo
Mosquitoes bit the refugees, got yellow fever, then bit the citizens of Philadelphia. +

9. Was what happened in Philadelphia an epidemic or a plague?

10. What is an epidemic?
An outbreak of a contagious disease that spreads rapidly and widely; affecting or tending to affect a disproportionately large number of individuals within a population, community, or region at the same time.
What is a plague?
A disastrous evil or affliction; an epidemic disease causing a high rate of mortality.

11. Yellow Fever Today
Common in West and Central Africa and parts of South America; very rare in U.S.
Preventable by immunization
Treatment: rest and fluids

12. END