Table 5. Prevalence and intensity of S. mansoni infection among 5- to 8-year-old children for baseline (2012) and final survey (2016) in a cluster-randomized trial in Côte d’Ivoire.
Arm 1: praziquantel treatment every year; Arm 2: praziquantel treatment only in the first two years, followed by two years whithout treatment; Arm 3: praziquantel treatment every other year without treatment in-between.
| Study year | Study arm | Number tested | Number infected | Prevalence (%) | Heavily infected (%) | Individual-level AM infection | Village-level AM infection |
|---|---|---|---|---|---|---|---|
| Baseline (2012) | 1 | 1,409 | 63 | 4.5 | 9 (0.6) | 165.9 | 8.2 |
| 2 | 1,750 | 82 | 4.7 | 9 (0.5) | 143.7 | 5.8 | |
| 3 | 1,653 | 112 | 6.8 | 9 (0.5) | 129.7 | 8.6 | |
| Total | 4,812 | 257 | 5.3 | 27 (0.6) | 146.4 | 7.5 | |
| Final survey (2016) | 1 | 1,442 | 52 | 3.6 | 1 (0.1) | 83.6 | 2.8 |
| 2 | 1,499 | 65 | 4.3 | 5 (0.3) | 108.6 | 4.7 | |
| 3 | 1,572 | 116 | 7.4 | 10 (0.6) | 110.8 | 7.4 | |
| Total | 4,513 | 233 | 5.2 | 16 (0.4) | 101.0 | 4.9 |
AM: arithmetic mean; Individual-level AM infection: excluding negative children expressed as EPG; Village-level AM infection: including negative children expressed as EPG; EPG: eggs per gram of stool