Table 1. Percentages of S. mansoni-positives and infection intensities: Microscopy versus PCR.
| Diagnostic method | Number of stool sample(s) taken into account a | Percentage of positives (n) | Median infection intensity (range) b | ||
|---|---|---|---|---|---|
| Senegal | Kenya | Senegal | Kenya | ||
| Microscopy | 1 | 57.4% (113/197) | 19.2% (146/760) | 200 (20–3120) epg | 18 (6–1482) epg |
| 2 | 68.5% (135/197) | 25.9% (197/760) | 200 (10–3470) epg | 15 (3–1221) epg | |
| 3 | N/A | 29.5% (224/760) | N/A | 12 (2–1164) epg | |
| PCR | 1 | 72.6% (143/197) | 32.4% (246/760) | Ct = 22.1 (16.5–37.9) | Ct = 24.6 (17.7–38.1) |
a Stool samples were collected on consecutive days. In Senegal, a duplicate 25 mg Kato-Katz slide was prepared from each stool sample. Duplicate slides were examined by two different technicians, and the average egg count was calculated. In Kenya, a duplicate 42 mg Kato-Katz slide was prepared from each sample. Each slide was examined by two microscopists and the average was recorded.
b For egg-positive and/or PCR-positive individuals only.