The leech multiplies its body mass by six or seven ... visits Kenya to see how the beef tapeworm needs to infect both beef cattle and humans to complete its life-cycle. Infested by Toxoplasma ...

Grazing cattle usually provide the juice, but you'll do. The leeches aren't too discriminating, and they're hungry. Real hungry. "What are we doing in the forest?" Oh, sorry. To get to the swamps ...