Table 2 Analysis of the parasitaemia results of 17 specimens containing Plasmodium falciparum
From: Estimating the parasitaemia of Plasmodium falciparum: experience from a national EQA scheme
No | Reference mean parasitaemia | Participants mean parasitaemia | Standard deviation | No. and % of participants reporting parasitaemia > reference mean | % over estimating parasitaemia | % under estimating parasitaemia | % not specifying parasitaemia | Incorrect Plasmodium species reported |
|---|---|---|---|---|---|---|---|---|
1 | 0.1% | 0.5% | 0.4 | 136 (62%) | 12% | 0% | 22 (10%) | P. vivax 16/217 (7%) |
P. ovale 10/217 (5%) | ||||||||
2 | 0.25% | 0.4% | 0.3 | 105 (49%) | 17% | 0% | 50 (19%) | P. vivax 44 (17%) |
P. ovale 37 (14%) | ||||||||
P. malariae 13 (5%) | ||||||||
3 | 1.1% | 1.4% | 0.57 | 116 (42%) | 18% | 5% | NA* | None |
4 | 1.4% | 1.5% | 0.69 | 85 (43%) | 14% | 2% | 74 (27%) | P. vivax 1/198 (0.3%) |
P. malariae 1 (0.3%) | ||||||||
5 | 1.8% | 2.3% | 0.8 | 123 (59%) | 15% | 10% | 58 (22%) | P. vivax 15/266 (6%) |
P. ovale 5 | ||||||||
(2 %) | ||||||||
P. malariae 3 (1%) | ||||||||
6 | 2.5% | 2.8% | 1.3 | 75 (44%) | 11% | 8% | NA* | P. vivax 5/170 (3%) |
P. ovale 2/170 (1%) | ||||||||
7 | 2.5% | 3% | 1.3 | 127 (62%) | 14% | 3% | 66 (24%) | P. vivax 10/271 (4%) |
P. ovale 1 (0.4%) | ||||||||
P. malariae 2 (0.7%) | ||||||||
8 | 2.5% | 3% | 1 | 138 (66%) | 19% | 2% | 49 (19%) | P. vivax 7 (3%) |
9 | 3% | 3.5% | 1.1 | 68 (66%) | 12% | 4% | 170 (54%) | P. malariae 1/236 (0.4%) |
10 | 5% | 5.8% | 2 | 91 (51%) | 13% | 10% | 66 (27%) | P. vivax 3/243 (1%) |
P. ovale 4 (1.6%) | ||||||||
P. malariae 20 (8%) | ||||||||
11 | 7.5% | 11.8% | 4.4 | 98 (35%) | 9% | 4% | NA* | P. ovale 1/115 (1%) |
12 | 9% | 9.2% | 2.5 | 92 (45%) | 20% | 19% | 53 (21%) | None |
13 | 10.5% | 11.5% | 3.4 | 96 (54%) | 30% | 3% | 79 (31%) | P. ovale 1/256 (0.4%) |
P. malariae 1 (0.4%) | ||||||||
14 | 16% | 18% | 4.5 | 130 (57%) | 35% | 3% | 9 (4%) | P. vivax 2/226 (1%) |
15 | 20% | 24.2% | 4.6 | 99 (46%) | 33% | 4% | NA* | None |
16 | 20% | 20.8% | 6.7 | 120 (40%) | 25% | 0 | NA* | P. vivax 1/300 (0.3%) |
17 | 30% | 32% | 10 | 80(39%) | 10% | 25% | 52 (21%) | P. vivax 1/253 (0.4%) |
(Babesia sp. 4 (2%)) |