Table 2 Prevalence of schistosomiasis based on rapid diagnostic tests and microscopy for Huambo, Uige and Zaire provinces

S. mansoni

 RDT

N = 7620

N = 7793

N = 1680

N = 17,093

 Overall when trace positive, % (range)

20.8 (6.6–47.2)

21.2 (2.0–74.8)

23.1 (0.9–47.1)

21.2 (0.9–74.8)

 Overall when trace negative, % (range)

8.9 (2.7–18.4)

16.1 (0.9–55.0)

14.1 (0–29.9)

11.8 (0–55.0)

 Microscopy

N = 1501

N = 1818

N = 330

N = 3649

 Light intensity, % (95% CI)

0.2 (0.05–0.9)

20.0 (9.0–38.6)

0.1 (0.01–1.1)

8.9 (3.5–20.4)

 Moderate intensity, % (95% CI)

0

0.04 (0.01–0.3)

0

0.02 (0.003–0.1)

 Heavy intensity, % (95% CI)

0

0

0

0

 Overall, % (range)

0.2 (0–0.8)

20.0 (0–87.4)

0.1 (0–1.3)

8.9 (0–87.4)

S. haematobium

 RDT

N = 7620

N = 7793

N = 1680

N = 17,093

 Overall when trace positive, % (range)

18.7 (0–29.8)

5.6 (0.7–9.9)

11.3 (3.8–31.2)

13.6 (0–31.2)

 Overall when trace negative, % (range)

11.9 (0–20.8)

2.8 (0.3–9.6)

7.0 (0–18.0)

8.4 (0–20.8)

 Microscopy

N = 1500

N = 1615

N = 330

N = 3445

 Light intensity, % (95% CI)

5.7 (3.3–9.6)

0.6 (0.2–1.7)

1.7 (0.3–8.7)

3.4 (2.1–5.4)

 Heavy intensity, % (95% CI)

2.7 (1.3–5.5)

0.1 (0.05–0.4)

1.6 (0.2–12.7)

1.6 (0.8–3.1)

 Overall, % (range)

8.4 (0–34.4)

0.7 (0–5.9)

3.3 (0–6.6)

5.0 (0–34.4)

Any schistosomiasis

 RDT

N = 7620

N = 7793

N = 1680

N = 17,093

 Overall when trace positive, % (range)

34.7 (26.9–57.0)

25.3 (5.9–77.3)

32.2 (6.9–51.2)

31.4 (5.9–77.3)

 Overall when trace negative, % (range)

19.1 (12.5–31.5)

18.4 (3.5–55.6)

20.1 (1.6–34.1)

19.0 (1.6–55.6)

 Microscopy

N = 1501

N = 1818

N = 330

N = 3649

 Overall, % (range)

8.6 (0–34.4)

24.7 (0–87.4)

3.3 (0–6.6)

14.5 (0–87.4)