Skip to main content

Table 2 O. volvulus nodule, skin Mf prevalence, and density after several rounds of ivermectin mass drug administration

From: Persistence of onchocerciasis in villages in Enugu and Ogun states in Nigeria following many rounds of mass distribution of ivermectin

State

Study village

Baseline nodule prevalencea,b

Number of ivermectin MDA rounds

Number of participants

Nodule prevalence (95% CI)

Skin microfilaria prevalence (95% CI)

Geometric mean Mf/mg

Enugu

       
 

Amokwe

42.0

26

45

55.6 (44.2, 60.5)

51.1 (37.0, 65.0)

2.2

 

Eziobodo

54.0

26

45

51.1 (37.0, 65.0)

33.3 (21.4, 48.0)

3.1

 

Obinagu/Eziama

58.0

26

50

42.0 ( 29.4, 55.8)

32.0 (20.8, 45.9)

3.0

 

Ugwuorie

42.0

26

30

46.7 (30.3, 63.8)

36.7 (21.9, 54.6)

1.0

 

Umuezemanna

44.0

26

15

66.7, 41.5, 84.8)

46.7 (24.9, 69.8)

1.6

 

Umunnakwe

44.0

26

40

62.5 (46.9, 75.6)

50.0 (35.2, 64.8)

2.2

Ogun

       
 

Abule Aje

4.8

14

41

0 (0.0, 10.5)

4.9 (0.6, 17.2)

0.3

 

Abule Peter

4.8

14

43

0 (0.0, 10.0)

2.3 (0.0, 13.4)

0.2

 

Adeaga

16.0

11

32

3.1 (0.0, 17.4

28.1 (15.5, 45.6)

0.4

 

Ibara Afon

30.0

14

48

4.2 (0.4, 14.9)

6.3 (1.6, 17.6)

0.3

 

Ibaro

12.0

14

42

9.5 (0.3, 22.8)

28.6 (17.1, 43.7)

3.4

 

Idode

6.0

0

50

4.0 (0.4, 14.4)

20.0 (11.1, 33.1)

0.3

 

Imomo

6.0

0

40

25.0 (13.1, 42.4)

15.0 (6.8, 29.6)

0.3

 

Isara

22.0

3

32

10.7 (3.0, 28.2)

9.4 (2.6, 25.2)

0.3

 

Olokemeji

16.0

11

28

10.9 (4.4, 23.6)

21.4 (9.9, 40.0)

0.4

 

Olowo

16.0

11

46

3.7 (2.2, 6.1)

0.0 (0.0, 9.4)

0.0

  1. aBaseline surveys (REMO) for Enugu state study villages were conducted in 1994
  2. bBaseline surveys (REMO) for Ogun state study villages were conducted between 1995 and 2000