Aedes aegypti mosquito is responsible for the acquisition of Yellow fever virus by human beings and monkeys. When the infected mosquito bites a healthy person, the virus is transmitted from salivary glands of the mosquito to the bloodstream of the person.
The incubation period of this virus is 3-6 days during which no symptoms are present. After this period, acute phase is started and the person starts experiencing symptoms.
Yellow fever can be mild or severe. Yellow Fever Vaccination can help you to and your family to protect against yellow fever.
In mild cases, symptoms like fever, headache, and nausea are seen. If the disease progresses, it can cause damage to kidneys, liver and heart. Up to 50% people who have contracted severe form of this disease die within a few days of the infection.
Image Source: Google
Children and older people have a higher risk of becoming seriously ill. Death usually occurs within two weeks after the infection. In the case of survival, recovery is slow, often taking more than several weeks or months.
In the recovery time, the patient may also develop jaundice, kidney and liver diseases along with delirium and coma. Bacterial infections like Pneumonia are also possible.
Diagnosis of yellow fever is difficult since this disease can be easily confused with malaria or dengue fever. Blood tests may heal reveal the presence of a virus. Enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR) can also be performed to detect virus specific antibodies and antigens.
No effective medicine is available against the Yellow Fever virus. Treatment is usually symptomatic and supportive. It includes supplying oxygen and fluids, maintaining blood pressure, plasma transfusions for blood loss or dialysis for kidney damage. The person is kept away from mosquitoes to prevent further transmission.