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Table 3 Prevalence of microfilariae (mf) by age before and after 4 rounds of mass drug administration (MDA)

From: Sustained reduction in prevalence of lymphatic filariasis infection in spite of missed rounds of mass drug administration in an area under mosquito nets for malaria control

 

No. mf positive/No. examined (% mf positive)

  

Age group (years)

2002 (Pre-MDA)

95% CI

2009 (Post 4 MDAs)

95% CI

% Decrease

< 11

30/350 (8.6)

5.6 - 11.5

0/220 (0.0)

-

100.0

11 - 20

76/415 (18.3)

14.6 - 22.0

1/402 (0.2)

0.0 - 1.0

98.9

21 - 30

55/228 (24.1)

18.5 - 29.7

0/108 (0.0)

-

100.0

31 - 40

43/150 (28.7)

21.5 - 35.9

3/127 (2.4)

0.0 - 5.1

91.6

41 - 50

40/136 (29.4)

21.7 - 37.1

3/106 (2.8)

0.0 - 5.9

90.5

> 50

53/140 (37.9)

29.9 - 45.9

3/116 (2.6)

0.0 - 5.5

93.1

All

297/1419 (20.9)

18.8 - 23.0

10/1079 (0.9)

0.3 - 1.5

95.7