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Table 5 Prevalence and intensity of S. mansoni and hookworm infections in the newly-recruited cohorts of previously untreated 6-year-old children before and after treatment

From: Parasitological impact of 2-year preventive chemotherapy on schistosomiasis and soil-transmitted helminthiasis in Uganda

S. mansoni

    
 

Baseline

Follow-up Year 1

Follow-up Year 2

Overall reduction

Prevalence (%)

    

Overall

34.9 (31.9–37.8) (n = 1 018)

27.7 (25.0–30.4) (n = 1 075)

22.6 (19.9–25.2) (n = 961)

35.2%

Region

    

   Albertine Nile

22.4 (17.9–26.9) (n = 330)

12.9 (9.5–16.4) (n = 371)

11.3 (7.9–14.6) (n = 346)

49.6%

   Lake Albert

47.5 (41.3–53.6) (n = 255)

42.4 (36.7–48.1) (n = 288)

32.3 (26.3–38.4) (n = 229)

32.0%

   Lake Victoria

37.0 (32.4–41.5) (n = 433)

30.8 (26.3–35.2) (n = 416)

26.9 (22.5–31.4) (n = 386)

27.3%

Intensity of infection (epg)

    

Overall

171.1 (141.5–200.7) (n = 1 018)

119.9 (92.1–147.8) (n = 1 075)

72.0 (50.9–93.1) (n = 961)

57.9%

Region

    

   Albertine Nile

93.7 (53.4–133.9) (n = 330)

42.7 (18.9–66.5) (n = 371)

10.8 (6.1–15.4) (n = 346)

88.5%

   Lake Albert

152.9 (111.9–193.8) (n = 433)

84.2 (55.9–112.5) (n = 416)

86.2 (59.2–113.3) (n = 386)

43.6%

   Lake Victoria

302.3 (223.9–380.7) (n = 255)

271.1 (182.7–359.5) (n = 288)

140.6 (65.6–215.6) (n = 229)

53.5%

Hookworms

    

Prevalence (%)

    

Overall

48.4 (45.4–51.5) (n = 1 018)

24.7 (22.1–27.3) (n = 1 075)

15.9 (13.6–18.2) (n = 961)

67.1%

Region

    

   Albertine Nile

46.1 (40.7–51.4) (n = 330)

14.0 (10.5–17.6) (n = 371)

10.7 (7.4–14.0) (n = 346)

76.8%

   Lake Albert

39.6 (33.6–45.6) (n = 255)

10.8 (7.2–14.4) (n = 287)

12.2 (8.0–16.5) (n = 229)

69.2%

   Lake Victoria

55.4 (50.8–60.2) (n = 433)

43.6 (38.9–48.4) (n = 417)

22.8 (18.6–27.0) (n = 386)

58.8%

Intensity of infection (epg)

    

Overall

232.7 (188.4–276.9) (n = 1 018)

84.6 (63.6–105.6) (n = 1 075)

51.4 (33.4–69.5) (n = 961)

77.9%

Region

    

   Albertine Nile

184.1 (137.2–231.0) (n = 330)

39.7 (6.7–72.7) (n = 371)

27.8 (8.4–47.3) (n = 346)

84.9%

   Lake Albert

171.0 (97.4–244.7) (n = 255)

20.2 (9.6–30.8) (n = 288)

32.2 (4.5–59.8) (n = 229)

81.2%

   Lake Victoria

306.0 (218.6–393.4) (n = 433)

168.9 (124.9–212.8) (n = 416)

84.0 (46.0–122.0) (n = 386)

72.5%

  1. Figures in () indicate 95% confidence intervals; n, number of subjects in the group.