Table 6.
Number of HRP-2 RDT brands affected by prozone in relation to the parasite density and HRP-2 test line intensity for undiluted samples (negative, faint and weak)
| Parasite density % | Number of samples assessed | Prozone for at least 1RDT | Prozone for at least 2 RDTs | Prozone for at least 3 RDTs | Prozone for at least 4 RDTs | Prozone for at least 5 RDTs | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Weak | Faint or no line | Weak | Faint or no line | Weak | Faint or no line | Weak | Faint or no line | Weak | Faint or no line | ||
| 1 to 3.9 | 45 | 10 | 3 * | 8 | - | 5 | - | 2 | - | - | - |
| 4 to 4.9 | 18 | 4 | 4 † | 8 | 0 | 7 | - | 2 | - | - | - |
| 5 to 9.9 | 39 | 13 | 8 ‡ | 11 | 2 £ | 8 | - | 4 | - | 1 | - |
| ≥ 10 | 19 | 6 | 4 $ | 8 | 1 + | 8 | - | 3 | - | 2 | - |
* Parasite densities of 2.2, 2.9 and 3.4%
† Parasite densities of 4.1, 4.2, 4.3 and 4.7%
‡ Parasite densities of 8.0, 8.0, 8.3, 8.3, 8.4, 8.6, 8.9 and 9.3%
£ Parasite densities of 8.0 and 8.3%
$ Parasite densities of 10.6, 11.0, 11.5 and 28.7%
+ Parasite densities of 28.7%