(Encyclopedia) river blindness or onchocerciasis, disease caused by the parasitic nematode worm Onchocerca volvulus. The worm larvae are transmitted by the bites of blackflies (genus Simulium) that…
(Encyclopedia) CongoCongokŏngˈgō [key] or ZaïreCongozīˈēr, zäērˈ [key], great river of equatorial Africa, c.2,720 mi (4,380 km) long, formed by the waters of the Lualaba River and its tributary, the…
(Encyclopedia) SenegalSenegalsĕnĭgôlˈ, sĕnˈĭgôl [key], river, c.1,000 mi (1,610 km) long, formed in SW Mali, W Africa, by the confluence of the Bafing and Bakoy rivers, both of which rise in the…
(Encyclopedia) Smoky Hill River, c.560 mi (900 km) long, rising on the Great Plains, E Colo., and flowing E across Kansas to join the Republican River and form the Kansas River at Junction City. The…
(Encyclopedia) Parsnip, river, c.150 mi (240 km) long, rising in central British Columbia, Canada, and flowing northwest to join the Finlay River at Williston Lake and form the Peace River. Explored…
(Encyclopedia) Trent, river, c.170 mi (270 km) long, rising on Biddulph Moor, Staffordshire, W England. It flows generally NE through central England before joining with the Ouse River to form the…
(Encyclopedia) Ottawa, river, c.700 mi (1,130 km) long, largest tributary of the St. Lawrence River, Canada. It rises in the Laurentian Highlands, SW Que., and flows generally W through La Vérendrye…
(Encyclopedia) Gambia, river, c.700 mi (1,130 km) long, rising on the Fouta Djallon, N Guinea, W Africa, and flowing generally northwest through SE Senegal then west, bisecting The Gambia, to the…
(Encyclopedia) Fraser, chief river of British Columbia, Canada, c.850 mi (1,370 km) long. It rises in the Rocky Mts., at Yellowhead Pass, near the British Columbia–Alta. line and flows northwest…
(Encyclopedia) French Broad River, 210 mi (338 km) long, rising in the Blue Ridge Mts., W N.C., and flowing N and then NW to Knoxville, E Tenn., where it joins with the Holston to form the Tennessee…
