Figure 1.

Impact of DEC on microfilaria prevalence rates in Samoa: 1964–1994. DEC-based MDAs were administered at either 5 or 6 mg/kg body weight as either a single annual dose or monthly for 12 or 18 months, as indicated. Ivermectin (+Iv) was administered in 1996 and 1997 at a dose of 200 μg/kg body weight with a single dose of DEC at 6 mg/kg body weight [5].