Table 1. Trend in prevalence of mf in the R. Bakoye focus.

	Pre-control (1988–1990)*	Phase 1* (after 14 years Rx)	Phase 3a (1.75 yrs after last Rx)	Phase 3b (3–4 yrs after last Rx)
Villages surveyed	11	40	20	20
Census population	2,421	9,868	5,816	6,158
Examined: Number	1,819	6,899	3,739	3,520
%	75.1%	69.9%	64.3%	57.2%
Mf positive: Number	790	18	2	0
%	43.43%	0.26%	0.05%	0.00%
95% confidence interval
lower limit	41.14%	0.15%	0.01%	0.00%
upper limit	45.75%	0.41%	0.19%	0.10%
% of villages with:
Prevalence <1%	0	95	90	100
Prevalence <5%	0	100	100	100

^*Source: Diawara et al [17].