Table 1 General characteristics of the surveyed study population between 1988 and 2011 in Farafenni, the Gambia

Timing of survey

November

November

July^a

January/february

October

Season

Peak transmission

Peak transmission

Start wet season

Dry season

Peak transmission

Median age in years (range)

5 (1–41)

14 (1–90)

11 (1–83)

13 (1–80)

10 (1–15)

Parasite prevalence^b

 1–5 year olds

62 (57–66)

17 (11–23)

39^c (31–46)

16 (9–22)

2 (0–4)

 1–15 year olds

60 (56–64)

22 (18–26)

40^d (33–46)

18 (14–22)

3 (1–4)

 All ages

53 (49–57)

16 (13–19)

34 (30–38)

13 (11–16)

3 (1–4)

Number sampled for serology

Seroprevalence^e

 1–5 year olds

19 (15–23)

19 (12–25)

12 (7–17)

13 (7–19)

1 (0–2)

 1–15 year olds

23 (20–26)

31 (27–36)

23 (18–27)

20 (16–24)

13 (10–16)

 All ages

28 (25–31)

46 (42–50)

35 (31–39)

34 (30–38)

13 (10–16)

Reference

[14, 19]

[20, 21]

[22]

[16]

[23]