KAKALE MASSA, Chad — Martoussia, the celebrity of the moment in this remote African fishing village, pants heavily under the awning where he lies chained. Still, he remains calm and sweet-tempered as ...

A decades-long push to make Guinea-worm disease the first parasitic infection to be wiped out is close to victory. But a mysterious epidemic of the parasite in dogs threatens to foil the eradication ...

For the past few years, the world has been on the edge of one of the biggest medical triumphs of modern history: Wiping out a horrific parasite from the face of the Earth. In the early '80s, there ...