Table 1.
Characteristics of the four study populations
| Population | Kisumu | Kilifi pre malaria decline | Kilifi post malaria decline | Sudan |
|---|---|---|---|---|
| Malaria transmission intensity | High | Medium-high | Medium-low | Low |
| Number of samples | 49 | 33 | 49 | 52 |
| Year of sample collection | 2008 | 1994–1996 | 2010 | 2007 |
| Median age in months | 36 | 30 | 53.5 | 84 |
| (range) | (6–72) | (11–37) | (14–147) | (12–612) |
| log10 median parasitaemia | 5.3 | 4.7 | 5.1 | 5.1 |
| (par/μl) (range) | (4.9–5.8) | (4.0–5.8) | (2.5–6.1) | (4.4–5.8) |
| Median hemoglobin (g/dl) | 9.9 | 9.4 | 10.6 | 9.6 |
| (range) | (5.2–15.2) | (5.3–13.2) | (3.4–12.1) | (3.2–12.9) |
| Median number of clones | 2 | 2 | 2 | 2 |
| (range) | (1–6) | (1–7) | (1–5) | (1–5) |
| Monoclonal infections (percentage) | 10.2 | 33.3 | 18.4 | 26.9 |