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Zika More Dangerous Than Previously Thought


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Most doctors and medical researchers now agree that there is a link between the Zika virus and microcephaly, where babies are born with abnormally small heads because of restricted brain development.

 

While it is estimated that 1% of women who have had Zika during pregnancy will have a child with microcephaly, leading doctors in Brazil have told the BBC that as many as 20% of Zika-affected pregnancies will result in a range of other forms of brain damage to the baby in the womb.

 

A separate study, reported in the New England Journal of Medicine, said that "29% of scans showed abnormalities in babies in the womb, including growth restrictions, in women infected with Zika".

 

"Our findings are worrisome because 29% of ultrasonograms showed abnormalities, including intrauterine growth restrictions and foetal death, in women with positive Zika infection," the study said.

 

Many of the conditions that Brazilian doctors are noticing in babies born to mothers who had Zika are not as obvious to the untrained eye as microcephaly.They may not have the same impact on the child's development either but the frequency with which they are occurring is alarming.

 

Doctor Renato Sa is a senior obstetrician who works in both public and private hospitals in Rio de Janeiro. "There are cerebral calcifications, an increase in the number of dilation of cerebral ventricles and the destruction or malformation of the posterior part of the brain," he says.

 

In my notebook he makes a list of the conditions that they are now witnessing with increasing regularity; ventriculomegaly, damage of the posterior fossa, craniocynostosis and cerebral calcification.

 

He says that an added concern is that often there is no obvious sign or symptom of the neurological damage until later observations of the child's development, "perhaps convulsions or other tell-tale signs".

 

At the Instituto D'Or laboratories in Rio de Janeiro they are using stem-cell technology to create new cells that develop like human brains. They call them "mini brains" and infect them with Zika.

 

"What we observed is that the Zika virus is able to kill cells, is able to affect the growth of cells," says Dr Stevens Rehen, the unit's senior neuroscientist. Dr Rehen has noted, as have others, that there is something particularly virulent about the strain of Zika that arrived in Brazil and is presently spreading across the continent.

 

"There is something in the Zika virus that makes it more prone to kill neurocells during development. Now we need to search and understand what makes that virus more aggressive to the brain under development."

 

The team was shocked by what it discovered -- a huge reduction in growth of the cerebral cortex, the critical outer layer of the brain.

 

"The effect of the Zika virus was very impressive," says Dr Patricia Garcez. "We were all astonished by the fast effect. We saw cell death in three days, a massive cell death. In six days, the neurospheres were completely gone."

 

In a change to earlier patterns, the areas of greatest infection for Zika are now in the south of the country, particularly in Rio de Janeiro.

 

Among some sectors of society, public information campaigns about the need for using anti-mosquito repellent and taking other precautions appear to be having a positive impact.

 

Dr Sa says that the number of Zika cases among middle-class pregnant women has fallen sharply, as have cases of microcephaly and other related conditions. But he says that the disappointing reality is that such progress is not apparent in the city's many poor working-class neighbourhoods, such as Duque de Caxias in the north of Rio de Janeiro.

 

 

 

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rasbridge

Well, the Zika outbreak makes me feel fortunate to be living in an extremely arid desert region...

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Dce3480

Zika :pos: on the Brain would be like A Brain Tumor like? What! the Fuck.. :P  :dance2::idea:

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  • 2 weeks later...

Should Zika virus be a worldwide outbreak and there is no cure for it, we would see a declining birth rate throughout the world. And that's what happen when you have genetically modified mosquitoes which was not properly contained.

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