| recrudescence of onchocerciasis in the comoé valley in southwest burkina faso. | onchocerciasis control by vector control was instigated in southwest burkina faso in january 1969 by orstom/occge, and continued until operations were taken over by the who onchocerciasis control programme (ocp) in february 1975, which itself ceased operations in the area in 1989 when onchocerciasis was judged to have been reduced to insignificant levels. initially (1969-1975) vector immigration maintained unacceptably high levels of transmission, but ocp was much larger than the preceding campa ... | 2017 | 27845063 |