They looked at two worm species: Brugia malayi, which causes swelling of the limbs, and Onchocerca volvulus, which causes skin diseases and blindness. In both worms, the researchers saw viruses ...

Niger has become the first African country to eliminate river blindness, a parasitic disease that is the second-leading cause of blindness in the world, the WHO said Thursday. Niger is 'the fifth ...

It is caused by the parasitic worm Onchocerca volvulus and spreads through blackfly bites. When a blackfly bites an infected person, it ingests immature worms (microfilariae). These worms develop ...