Zika virus: Florida cases ‘highly likely’ to be first US-based infections
29 July 2016
- From the section US & Canada
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Four people suffering from the Zika virus in Florida are probably the first cases contracted within the US, state health officials say.
So far, cases outside of Latin America and the Caribbean, where the virus is prevalent, have been spread by travel to that region or sexual transmission.
The four Florida cases raise the chance US mosquitoes can now carry the virus.
Zika causes only a mild illness in most people but the virus has been linked to severe brain defects in newborns.
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The Florida department of health said “a high likelihood exists that four cases are the result of local transmission”, centred on one small area just north of downtown Miami.
Three of those suffering the virus were in Miami-Dade county, and another in neighbouring Broward county.
Gov Rick Scott said the cases involved three men and a woman, and that neither had been hospitalised.
The US Food and Drug Administration has asked for blood donation in both counties to be suspended, and Gov Scott said all donations already made would now be tested for Zika.
More than 1,650 cases of Zika virus have so far been detected in the United States, but the Florida cases would be the first in the US not involving sexual contact or foreign travel.
To confirm whether Zika is being carried by mosquitoes locally, scientists are surveying houses and people within a 150-yard (metre) radius of the cases, the flying distance of the insect.
In February, the World Health Organization declared the Zika virus a global public health emergency because of the risk to newborn children.
In severe cases, children can die and babies who survive can face intellectual disability and developmental delays.
Gov Scott asked all residents of affected areas to get rid of standing water, where mosquitoes thrives, and for residents to wear insect repellent.
How Zika can spread
- Bites from the aedes aegypti mosquitoes that carry the virus
- Maternal transmission from mother to baby in the womb
- Unprotected vaginal, oral or anal sexual intercourse – although rare, the virus can persist in semen
- Zika virus has been found in other bodily fluids, including saliva and urine, but it is unknown whether it can spread through these routes
- Blood transfusion – very likely but not confirmed
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