ScienceGermination

Mosquitoes Bring Disease, Maybe Birth Defects, To US Border

A tropical disease carried by mosquitoes that may cause birth defects is moving north to the United States border.

PUBLISHED
An Aedes aegypti mosquito, the species that carries Zika virus, bites a human. Photograph by US Department of Agriculture via Wikimedia Commons.

This is disturbing and sad. A tropical disease that is spread by mosquitoes and that seems to be moving north—and may be approaching the US border—is being linked in health-agency reports to a disabling birth defect.

The disease is Zika virus, and the birth defect is microcephaly: smaller than normal heads in infants, due to the brain having stopped growing at some point in pregnancy. According to the World Health Organization, Brazil has reported739 cases of microcephaly among newborns in nine states in the “shoulder” of Brazil, the northeastern corner that protrudes into the Atlantic. Brazil’s Ministry of Health says there are more: 1,248 suspected cases, in 14 states. Seven children have died, and five others’ deaths are being investigated, according to the Ministry; one adult and one teenager have also died.

Only one child, who died, has been definitively diagnosed with the virus by tissue analysis, according to the Ministry’s statement. The agency has declared a national public health emergencyand, in its most recent statement, says it has asked the US Centers for Disease Control and Prevention to send...

Read the rest of this article on NatGeo.com
close

You are going to nationalgeographic.com/tv and different terms of use and privacy policy will apply.

CONTINUE

Follow Us

twitter

Subscribe for full access to read stories from National Geographic.