Table 1. The egg recovery rate for Ascaris and Trichuris across five experiments.
The p-values were based on a non-parametric test (Wilcoxon rank sum test).
Experiment | Ascaris | Trichuris | ||
---|---|---|---|---|
Median egg recovery rate (%) (minimum; maximum) | p-value pairwise comparison | Median egg recovery rate (%) (minimum; maximum) | p-value pairwise comparison | |
Flotation experiment (type of flotation solution) | ||||
MgSO4 (n = 8) | 7.5 (0; 21.0) | NaCl: 0.430 ZnSO4: 0.003 |
16.5 (4; 25) | NaCl: 0.958 ZnSO4: 0.226 |
NaCl (n = 8) | 10.5 (3.0; 17.0) | ZnSO4: 0.009 | 14.0 (6; 25) | ZnSO4: 0.100 |
ZnSO4 (n = 8) | 23.5 (11.0; 32.0) | 20.0 (12; 37) | ||
Flotation experiment (period of flotation for 1st coverslip) | ||||
5 min (n = 6) | 0.5 (0.0; 8.0) | 10 min: 0.253 15 min: 0.157 30 min: 0.044 |
3.0 (0; 9) | 10 min: 0.868 15 min: 0.145 30 min: 0.227 |
10 min (n = 6) | 4.0 (0.0; 10.0) | 15 min: 0.625 30 min: 0.128 |
2.0 (1; 10) | 15 min: 0.220 30 min: 0.252 |
15 min (n = 6) | 9.0 (0.0; 12.0) | 30 min: 0.470 | 8.0 (1; 10) | 30 min: 0.809 |
30 min (n = 6) | 9.0 (3.0; 24.0) | 6.5 (1; 24) | ||
Flotation experiment (total period of flotation over three coverslips) | ||||
35 min (n = 6) | 3.5 (0; 30) | 40 min: 0.228 45 min: 0.378 30 min: 0.378 |
17.5 (6; 37) | 40 min: 0.688 45 min: 0.423 30 min: 0.810 |
40 min (n = 6) | 15.0 (7; 32) | 45 min: 0.872 60 min: 0.936 |
12.0 (7; 25) | 45 min: 0.747 60 min: 0.688 |
45 min (n = 6) | 13.5 (7; 22) | 60 min: 0.810 | 14.5 (4; 25) | 60 min: 0.423 |
60 min (n = 6) | 13.5 (6; 24) | 19.0 (6; 29) | ||
Centrifugal force experiment | ||||
1,000 g (n = 8) | 28.0 (17.0; 55.0) | 0.293 | 22.0 (10; 41) | 0.753 |
2,000 g (n = 8) | 48.0 (15.0; 55.0) | 24.0 (14; 44) | ||
Tween experiment | ||||
0% (n = 8) | 48.0 (15.0; 55.0) | 0.371 | 24.0 (14.0; 44.0) | 0.010 |
0.05% (n = 8) | 37.0 (28.0; 46.0) | 39.5 (30.0; 57.0) | ||
Volume soil experiment | ||||
1 mL (n = 12) | 49.5 (13.0; 77.0) | 0.665 | 27.5 (3; 42) | 0.665 |
3 mL (n = 12) | 51.5 (27.5; 69.0) | 27.5 (6; 55) | ||
Strainer experiment | ||||
No (n = 8) | 66.5 (53.0; 80.0) | 0.674 | 33.5 (20; 57) | 0.103 |
Yes (n = 8) | 65.5 (46.0; 78.0) | 21.0 (10; 51) |