Yellow Fever

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Yellow Fever
Allison Gregg
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General History

• thousands of years old
• originated in Africa
• brought to the U.S. in the 1500s

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General History

• Walter Reed discovered how YF is
  transmitted-mosquitoes
• Yellow Fever from yellow color from liver failure

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General History and Structure

• Asian countries are habitats for mosquitoes that
  carry Yellow fever
• Single stranded RNA
• Shape spheroidal

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How YF is Transmitted

• 2 transmission methods
• jungle cycle
• urban cycle

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How YF is Transmitted

• can only be transmitted through mosquito bites
• cannot survive outside its vector-the mosquito

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How YF is Transmitted

• originally from monkeys
• becomes permanently fixed in salivary glands of
  mosquito

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Who is affected
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Who is affected

• tropical regions of Africa and South America
• 30,000 deaths each year worldwide
• estimate of 200,000 cases a year

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Who is affected

• epidemics usually affect 20 of the population
• unvaccinated populations can have death rates
  above 50

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Symptoms

• incubation period of 3-6 days
• acute phase
• toxic phase

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Symptoms

• 15 go into toxic phase
• 50 of toxic cause death
• hard to diagnose disease

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Vaccine

• a live-virus vaccine
• Vaccine must be given every 10 years
• 95 immunity a week after vaccination

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http//www.cdc.gov/ncidod/dvbid/yellowfever/

• http//www.ncbi.nlm.nih.gov/pubmedhealth/PMH000234
  1/
• http//www.who.int/mediacentre/factsheets/fs100/en
  /
• http//www.yellowfever.com.au/vaccine.html
• http//www.microscopy-uk.org.uk/mag/indexmag.html?
  http//www.microscopy-uk.org.uk/mag/art98/aedrol.h
  tml