Skip to main content

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)

From: Prozone in malaria rapid diagnostics tests: how many cases are missed?

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 -
  1. * Parasite densities of 2.2, 2.9 and 3.4%
  2. Parasite densities of 4.1, 4.2, 4.3 and 4.7%
  3. Parasite densities of 8.0, 8.0, 8.3, 8.3, 8.4, 8.6, 8.9 and 9.3%
  4. £ Parasite densities of 8.0 and 8.3%
  5. $ Parasite densities of 10.6, 11.0, 11.5 and 28.7%
  6. + Parasite densities of 28.7%