Study design

Two impact assessments of tsetse control were planned:(see Video 2)

• the first in 1989 following three years of baseline measurements on livestock health and productivity
• the second in 1994 following two further years of baseline measurements following the collapse of the first method of control in 1991.

The purposes of the studies were to investigate the effect of tsetse control on levels of trypanosome prevalence in cattle in the presence of high levels of drug resistance using as baselines the two previous non-control periods of three and two years, respectively. The impact on animal performance was also to be assessed.