Zika
can “wreak havoc” on the brains of adults and cause major, lasting damage. The research
could overthrow the assumption that the virus is only of major the virus is
only of major worry to pregnant women. Until now, the mosquito-borne infection
has been primarily linked to microcephaly, a serious defect where babies are
born with small heads and brain damage. That has meant that pregnant women were
warned to avoid coming into contact with the infection – but others have shown
no obvious symptoms. Experiments on adult mice engineered to mimic human Zika
infection show that the virus seems to attack immature cells in the adult
brain. Those same cells are vital to learning and memory – and so losing them
could have disastrous effects, comparable to those experienced by people with
Alzheimer’s. Over time, the gradual attack on those cells could lead to
shrinkage of the brain and major impairment of cognitive processes. The scientists
still aren’t sure the extent to which the behavior in mice could apply to
humans, or how permanent any damage sustained as a result of the virus might
be. But they say that further work must be done to find out if Zika could cause
long term mental impairment in adults.

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