More than 5,000 pregnant Colombian women are infected with the mosquito-borne Zika virus, the country's national health institute said on Saturday, as the disease continues its rapid spread across the Americas. Cases of the virus total 31,555, the institute said in a epidemiology bulletin, among them 5,013 pregnant women.
Zika, which has spread to more than 30 countries, has been linked to birth defect microcephaly and to neurological disease Guillain-Barre syndrome. Total reported Zika cases increased by 23 percent over last week's figures, while the number of pregnant women with the virus was up 57.8 percent.
Much remains unknown about Zika, including whether the virus actually causes microcephaly. Brazil is investigating the potential link between Zika infections and more than 4,300 suspected cases of the birth defect, a condition marked by abnormally small head size that can result in developmental problems. Researchers have confirmed more than 460 of these cases as microcephaly and identified evidence of Zika infection in 41 of these cases, but have not proven the virus can cause microcephaly. There are so far no recorded cases of Zika-linked microcephaly in Colombia, the government has said. Officials are still examining figures from countries such as Brazil, but say Colombia can expect between 500 and 600 cases this year.
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