Soil-transmitted helminthiases (STH) are caused by four species of parasitic worms (Ascaris lumbricoides, Trichuris trichiura, and the hookworms Ancylostoma duodenale and Necator americanus ...

The procedure was pretty straightforward: he used a Band-Aid to press a few larvae of the New World hookworm (Necator americanus) gently onto his forearm, and waited for the microscopic critters to ...