Table 2. Trend in vector infectivity rate in the R. Bakoye focus.

	Phase 1* (after 15 years Rx)	Phase 2* (1.5 years after last Rx in test area)	Phase 3A (1.5–2.5 years after last Rx)				Phase 3B (2.5–3.5 years after last Rx)
Catching points	Infectivity rate (F3H/1000)	Infectivity rate (F3H/1000)	Flies examined	Infectivity rate (F3H/1000)	95% confidence interval		Flies examined	Infectivity rate (F3H/1000)	95% confidence interval
Badala	0.20	0.00	7,200	0.00	0.00	0.26	7,500	0.00	0.00	0.26
Kolontan	0.00	0.00	16,500	0.00	0.00	0.12	21,300	0.00	0.00	0.09
Tieourou	0.23	0.00	10,500	0.00	0.00	0.18	10,500	0.00	0.00	0.18
Toufinko	0.00	0.00	15,600	0.00	0.00	0.12	17,400	0.00	0.00	0.11
Total	0.14	0.00	49,800	0.00	0.00	0.04	56,700	0.00	0.00	0.03

^*Source: Diawara et al [17].