Table 4 Final criteria for group allocation according to degree of prior exposure to Plasmodium falciparum
From: Lessons learnt from the first controlled human malaria infection study conducted in Nairobi, Kenya
Groups | Malaria exposure | Primary criterion: | Secondary criterion: |
|---|---|---|---|
Anti-Pf serology* | Time spent in endemic region | ||
1, 3, 5 | Minimal | All negative | Lived majority of life in Nairobi or area where P. falciparum is not endemic. |
2, 4, 6 | Definite | Positive anti-schizont +/- positive anti-MSP2 | Considerable time spent in areas of P. falciparum transmission. |