Introduction
Zika virus is an emerging mosquito-borne virus that was first identified in Uganda in 1947 in rhesus monkeys through a monitoring network of sylvatic yellow fever. It was subsequently identified in humans in 1952 in Uganda and the United Republic of Tanzania.
Outbreaks of Zika virus disease have been recorded in Africa, the Americas, Asia and the Pacific. The incubation period (the time from exposure to symptoms) of Zika virus disease is only but a few days.
Signs and Symptoms
The symptoms are similar to other arbovirus infections such as dengue, and include microcephally (small head and small brain) in new born, fever, skin rashes, conjunctivitis, muscle and joint pains, malaise, and headache.
Transmission
Zika virus is transmitted to people through the bite of an infected mosquito of the Aedes genus, mainly Aedes aegypti in tropical regions. This is the same mosquito that transmits dengue, chikungunya and yellow fever.
Epidemiology
Diagnosis
Infection with Zika virus may be suspected based on symptoms and recent history (e.g. residence or travel to an area where Zika virus is known to be present). Zika virus diagnosis would thereafter be confirmed by laboratory testing for the presence of Zika virus RNA in the blood or other body fluids, such as urine or saliva.
Prevention
Treatment
Zika virus disease is usually relatively mild and requires no specific treatment. People sick with Zika virus are usually recommended plenty of rest, oral or intravenous fluid replacement, and prophylactic therapeutics with over the counter medicines. There is currently no vaccine available.
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