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ZIKA /MICROCEPHALY
Key facts- Zika virus disease is caused by a virus
transmitted by Aedes mosquitoes.
- People with Zika virus disease usually have
symptoms that can include mild fever, skin rashes, conjunctivitis, muscle
and joint pain, malaise or headache. These symptoms normally last for 2-7 days.
- There is no specific treatment or vaccine
currently available.
- The best form of prevention is protection
against mosquito bites.
- The virus is known to circulate in Africa, the
Americas, Asia and the Pacific.
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.- Genre: Flavivirus
- Vector: Aedes
mosquitoes (which usually bite during the morning and late
afternoon/evening hours)
- Reservoir: Unknown
Signs and Symptoms
The
incubation period (the time from exposure to symptoms) of Zika virus disease is
not clear, but is likely to be a few days. The symptoms are similar to other
arbovirus infections such as dengue, and include fever, skin rashes,
conjunctivitis, muscle and joint pain, malaise, and headache. These symptoms
are usually mild and last for 2-7 days.
Potential
complications of Zika virus disease
During
large outbreaks in French Polynesia and Brazil in 2013 and 2015 respectively,
national health authorities reported potential neurological and auto-immune
complications of Zika virus disease. Recently in Brazil, local health
authorities have observed an increase in Guillain-Barré syndrome which
coincided with Zika virus infections in the general public, as well as an
increase in babies born with microcephaly in northeast Brazil. Agencies
investigating the Zika outbreaks are finding an increasing body of evidence
about the link between Zika virus and microcephaly. However, more investigation
is needed to better understand the relationship between microcephaly in babies
and the Zika virus. Other potential causes are also being investigated.
Transmission
Zika virus
is transmitted to people through the bite of an infected mosquito from the Aedes
genus, mainly Aedes aegypti in tropical regions. This is the same
mosquito that transmits dengue, chikungunya and yellow fever. However, sexual
transmission of Zika virus has been described in 2 cases, and the presence of
the Zika virus in semen in 1 additional case. Zika virus disease outbreaks were reported for the first time from the Pacific in 2007 and 2013 (Yap and French Polynesia, respectively), and in 2015 from the Americas (Brazil and Colombia) and Africa (Cabo Verde). In addition, more than 13 countries in the Americas have reported sporadic Zika virus infections indicating rapid geographic expansion of Zika virus.
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 can only 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
Mosquitoes
and their breeding sites pose a significant risk factor for Zika virus
infection. Prevention and control relies on reducing mosquitoes through source
reduction (removal and modification of breeding sites) and reducing contact
between mosquitoes and people.
mild fever = febre baixa
skin
rashes = erupções cultâneas,
malaise =
mal-estar,
rhesus monkeys = macacos resus (a small brown macaque with red skin on
the face and rump, native to southern Asia. It is often kept in captivity and
is widely used in medical research.)
sylvatic = Silvestre,
reservoir = reservatório
arbovirus = grupos de
vírus que são transmitidos por mosquitos.
Texto da (Referência) WHO World Heath Organization (organização mundial de saúde)
-Questionário dengue ,Texto da (Referência) WHO World Heath Organization (organização mundial de saúde)
-Questionário chikungunya [acesse aqui]
-Questionário zika [aqui]
-Texto em Inglês sobre a Dengue [aqui]
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