 This is Ozarks at Large. For the Central Arkansas Library System, I'm Mark Criss with an encyclopedia of Arkansas Minute. A Lawrence County doctor helped find the link between mosquitoes and malaria. Zafni Orto was born in Tennessee in 1842, but moved to Clover Bend 30 years later after earning his medical degree. In 1882, he began investigating the potential connection between mosquitoes and malaria.