The finding was made nearly a decade ago in a sparsely populated island in Micronesia.
Health officials confirmed 9,000 kilograms of the larvicide in question have been imported
Brazil is investigating more than 4,300 suspected cases of microcephaly.
The World Health Organization estimates Zika could eventually affect as many as 4 million people worldwide
It would take at least 18 months to start clinical trials on humans of candidate vaccines against Zika
For definitive proof, however, more studies are needed.
The virus was detected in a 34-year-old man from Ganxian county in the eastern province of Jiangxi
There are 25,645 people infected with the disease in Colombia, among them are 3,177 pregnant women.
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