In this classic TPWKY episode we travel down rivers and into worm-laden nodes as we take a look at the complex world of Onchocerca volvulus, the vector-borne parasite that causes river blindness. Join us as we learn why the name ‘river blindness’ captures only one dimension of the devastation caused by this parasite, how the short evolutionary history of this worm is at once surprising and enlightening, and why grasping the disease ecology of this system has been crucial in successful control efforts. As a bonus, if you tune in, you’ll get to hear how on earth The J. Geils Band fits into this story and the integral role that dog digestion has played in the history of this parasite.