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YELLOW FEVER
MEDICAL ENTOMOLOGY

BIO4

• Yellow fever is an acute viral haemorrhagic disease
transmitted by infected mosquitoes
...

• Yellow fever virus is found in tropical and subtropical areas
in South America and Africa
...
Sylvatic (or jungle) yellow fever: In tropical rainforests, monkeys,
which are the primary reservoir of yellow fever, are bitten by wild
mosquitoes
...
Intermediate yellow fever: In this type of transmission, semidomestic mosquitoes infect both monkeys and people
...
This is the most common type of
outbreak in Africa
...
Urban yellow fever: Large epidemics occur when infected people
introduce the virus into heavily populated areas with high mosquito
density and where most people have little or no immunity
...


• Many people do not experience symptoms, but when these do
occur,
The most common are Fever, Muscle pain with prominent
backache, Headache, Loss of appetite and Nausea or
vomiting
...


• A small percentage of patients, however, enter a second,
more toxic phase within 24 hours of recovering from initial
symptoms
...

• In this phase people are likely to develop jaundice, dark
urine and abdominal pain with vomiting
...


• Half of the patients who enter the toxic phase die within 7
- 10 days
...
A single dose provides lifelong
protection for most people
...


PREVENTION
• 1
...

• 2
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• 3
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REFERENCE
• http://www
...
int/mediacentre/factsheets/fs100/en/
• https://www
...
gov/yellowfever/index

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