P falciparum invasion of AA and CC cells
| P falciparumline . | No. of ring-infected RBCs/1000 RBCs . | Ratio . | |
|---|---|---|---|
| AA | CC | CC/AA | |
| 3D7 | 19 | 24 | 1.26 |
| 3D7 | 14 | 22 | 1.57 |
| 3D7 | 8 | 5 | 0.63 |
| 3D7 | 10 | 9 | 0.90 |
| 3D7 | 19 | 10 | 0.53 |
| 3D7 | 10 | 11 | 1.10 |
| 3D7 | 17 | 12 | 0.70 |
| 3D7 | 30 | 32 | 1.07 |
| Indochina | 44 | 24 | 0.54 |
| Indochina | 10 | 8 | 0.80 |
| GB4 | 10 | 7 | 0.70 |
| GB4 | 12 | 14 | 1.17 |
| GB4 | 8 | 6 | 0.75 |
| 7G8 | 8 | 8 | 1.00 |
| 7G8 | 4 | 6 | 1.50 |
| 7G8 | 8 | 4 | 0.50 |
| FCB | 24 | 26 | 1.08 |
| P falciparumline . | No. of ring-infected RBCs/1000 RBCs . | Ratio . | |
|---|---|---|---|
| AA | CC | CC/AA | |
| 3D7 | 19 | 24 | 1.26 |
| 3D7 | 14 | 22 | 1.57 |
| 3D7 | 8 | 5 | 0.63 |
| 3D7 | 10 | 9 | 0.90 |
| 3D7 | 19 | 10 | 0.53 |
| 3D7 | 10 | 11 | 1.10 |
| 3D7 | 17 | 12 | 0.70 |
| 3D7 | 30 | 32 | 1.07 |
| Indochina | 44 | 24 | 0.54 |
| Indochina | 10 | 8 | 0.80 |
| GB4 | 10 | 7 | 0.70 |
| GB4 | 12 | 14 | 1.17 |
| GB4 | 8 | 6 | 0.75 |
| 7G8 | 8 | 8 | 1.00 |
| 7G8 | 4 | 6 | 1.50 |
| 7G8 | 8 | 4 | 0.50 |
| FCB | 24 | 26 | 1.08 |
Trophozoite- and schizont-infected AA cells were added simultaneously to AA or CC cells. After allowing 18 hours for schizont rupture, merozoite invasion of new RBCs and maturation to the ring stage, blood smears were examined. The number of ring-infected RBCs per 1000 RBCs in duplicate samples was counted and averaged. The ratio of ring-infected CC to AA cells is shown; the average ratio ± SD was 0.93 ± 0.31.