yellow fever is been caused by YELLOW FEVER(YF) VIRUS. It is an acute disease of high mortality, it occurs in tropical and subtropical areas, mainily in sub saharan Africa, central and South America and it affects people of all age.
How is yellow fever spread?
The yellow fever virus is spread by mosquitoes of the Aedes species when they bite humans. It is not spread directly from person to person. The Aedes mosquitoes acts as hosts for the infection and transmit it to people and are said to be vector's of the diseases. They breed in small accumulations of stagnant water.Mosquitores can acquire the virus by biting either infected monkeys or humans, and they can then spread it to humans.
Symptoms of yellow fever.
The illness may be so mild that it is not noticed. It can be confused with malaria, hepatitis and other's. Three to six days after a mosquito has infected a person he or she suddenly develops fever, chills, headache, backache, general muscle pain, stomach upset and vomiting. As the disease progresses, the affected person become's slow and weak, there is bleeding of the gums, there may be blood in the urine, they may be jaundice and black vomitus.
The complications of yellow fever.
This disease usually last two weeks, after which the patient either recovers or dies. Some of the complications include:
Convulsion, Coma, Death.
Treatment of yellow fever.
Yellow fever is diagnosed by performing a laboratory blood test. There is no specific treatment but patients may require fluids to compensate for dehydration. Persons recovering from yellow fever have lifelong immunity.
How to prevent yellow fever.
The disease is prevented by immunization with yellow fever vaccine. It is given to children in a single does, at 9 months at the same time as measles vaccine. The vaccine must be very safe and effective, producing antibodies against yellow fever that can last for 10year's or even longer. Prevention also involves the elimination of stagnant water in which the vector mosquitoes breed.
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