U.S., Brazil join forces to fight Zika; Easter Island dengue cases surge


Top U.S. and Brazilian medical experts met on Thursday to launch a research partnership to find a vaccine against the Zika virus that has spread rapidly through the Americas since it first appeared in the hemisphere last year.

Brazilian Health Minister Marcelo Castro said the experts would also pool resources and knowledge to develop better methods to test people for Zika and ways to eradicate the mosquito that spreads the virus linked to severe birth defects.

Brazil is scrambling to contain the Zika outbreak that threatens attendance at the Olympic Games in Rio de Janeiro in August. It has advised pregnant women to stay at home.

Researchers from the U.S. National Institutes of Health and the Centers for Disease Control and Prevention (CDC), along with experts from the Food and Drug Administration and the Health and Human Services department met with counterparts from Brazil’s leading biomedical research centers.

Among the issues they face is the need to agree on the evidence that Zika is causing the hundreds of confirmed cases in Brazil of babies born with abnormally small heads, a condition called microcephaly, and with other neurological diseases.

The World Health Organization (WHO), which declared the Zika outbreak a global public health emergency on Feb. 1, said last week that a stronger view of Zika’s link to microcephaly could become clearer within weeks.

While that relation has not been proven scientifically Brazilian authorities coping with an unprecedented number of babies with microcephaly say they are sure Zika is the cause, because most cases of microcephaly have occurred in the poorer northeast of Brazil where the Zika outbreak has hit hardest.

“We have no doubt that the epidemic of microcephaly that we are seeing in Brazil is caused by the Zika virus outbreak,” Castro told reporters on the sidelines of Thursday’s meeting.

Brazil’s Health Ministry announced on Wednesday that it was considering most of the 508 confirmed cases of microcephaly in the country to be linked to the Zika outbreak.

Castro said Brazil was making the reporting of all Zika cases mandatory, a step that had not been taken before due to the lack of kits to test for Zika.

WHO Director General Margaret Chan will visit Brazil next week to meet health officials in Brasilia and visit mothers with babies suffering from microcephaly in the northeastern city of Recife, at the epicenter of the epidemic in Brazil, Castro said.

Chile’s health ministry is meanwhile reporting 10 new cases of dengue on Easter Island.

The ministry says that eight adults and two minors from the same family have been infected but are recovering. That brings the total to 14 dengue cases in the Chilean territory in the South Pacific.

Easter Island is the only place in Chile where the Aedes aegypti mosquito is present. The mosquito can also carry viruses like chikungunya and the Zika that has spread throughout the Americas.

The ministry said Thursday that 26 suspicious cases were ruled out for dengue but are still being investigated for Zika and other diseases.

Easter Island is some 2,200 miles (3,500 km) west of continental Chile. It’s visited by thousands of tourists annually and is best-known for its giant stone statues.