Table 7. Mosquito collections and filarial DNA rates in mosquitoes before and after mass drug administration (MDA).

Survey	No. Pools	Mosq. per Pool (SD)	No. Mosquitoes Tested	Filarial DNA Rate (95% CI)
Pre-MDA-A	97	6.8 (6.1)	565	11.4 (10.87–21.25
Pre-MDA-B	119	7.5 (7.3)	892	15.1 (11.7–19.2)
MDA-1	118	6.2 (6.4)	726	3.7 (2.2–5.6)
MDA-2	130	6.7 (6.8)	926	4.8 (3.3–6.7)
MDA-3	100	6.2 (6.4)	620	1.02 (0.4–2.2)
Totals	573	6.5 (6.6)	3,729

Filarial DNA was detected in mosquitoes by PCR, and rates (maximum likelihood with 95% CI) were estimated by PoolScreen. The filarial DNA rate in mosquitoes collected in the MDA-3 survey (6 to 9 months after the third round of MDA) represented a 92.3% decrease from the rate in mosquitoes collected during the pre-MDA-B survey (just prior to the first round of MDA).