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WHO reports rise of rare neurological disorder in Zika outbreak


    Army soldiers set a banner that reads in Portuguese, “A mosquito is not stronger than a whole country” at the Central station, in Rio de Janeiro, Brazil, today.


    Army soldiers distribute pamphlets while explaining how to combat the Aedes aegypti mosquito that spreads the Zika virus, at the Central station, in Rio de Janeiro, Brazil, today. More than 200,000 army, navy and air force troops are fanning out across Brazil to show people how to eliminate the Aedes aegypti mosquito that spreads the Zika virus.

BERLIN » A rare neurological disorder is on the rise in several Latin American countries that are also seeing an outbreak of the Zika virus, the World Health Organization said today.

The U.N. health body in Geneva said in a weekly report that Guillain-Barre syndrome (GBS), which can cause temporary paralysis, has been reported in Brazil, Colombia, El Salvador, Suriname and Venezuela.

The increase in Guillain-Barre cases is appearing in conjunction with the spread of the Zika virus to 34 countries and also with increasing cases of microcephaly, a rare condition in which infants are born with abnormally small heads.

However, the health agency said “the cause of the increase in GBS incidence … remains unknown, especially as dengue, chikungunya and Zika virus have all been circulating simultaneously in the Americas.”

While “no scientific evidence to date confirms a link between Zika virus and microcephaly or GBS,” the agency pointed out that GBS was also observed during the 2013-14 Zika virus outbreak in French Polynesia.

In Brazil, which has been hardest hit by the current Zika outbreak, the state of Bahia in July reported 42 cases of GBS, 26 of them in patients with a history of symptoms consistent with Zika virus infection. In November, seven patients in Brazil presenting GBS were confirmed by laboratory tests to have a Zika virus infection, WHO reported.

“In 2015, a 19 percent increase in GBS cases was reported in comparison to the previous year” in the state of Bahia, the WHO said.

According to the U.S. Centers of Disease Control and Preventions, GBS symptoms include muscle weakness and sometimes paralysis. In the most serious cases, the muscle weakness can affect breathing and patients may need a breathing tube.

The Zika virus is spread by mosquitoes and the current outbreak has affected 34 countries, including 26 countries in the Americas, WHO said. Brazilian authorities estimate up to 1.5 million cases of Zika virus infection have occurred since the outbreak began, the agency said.

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