Table 6.
Estimated true prevalence of pig cysticercosis (Taenia solium, T. hydatigena, and T. asiatica) and dog taeniasis (T. hydatigena) adjusted by the maximum-likelihood estimation model for increments of test sensitivity, assuming specificity of 100%, Laos*
| Test sensitivity (%) | Estimated true prevalence of pig cysticercosis, % (95% CI) | Estimated true prevalence of T. hydatigena taeniasis in village dogs, % (95% CI) | ||
|---|---|---|---|---|
| T. solium | T. hydatigena | T. asiatica | ||
| 100 | 0.8 (0.1–1.6) | 22.4 (19.0–25.7) | 0.2 (0.0–0.5) | 1.9 (0.0–4.5) |
| 90 | 0.9 (0.1–1.8) | 24.9 (21.1–28.6) | 0.2 (0.0–0.6) | 2.1 (0.0–5.0) |
| 80 | 1.1 (0.1–2.0) | 28.0 (23.8–32.2) | 0.2 (0.0–0.6) | 2.4 (0.0–5.6) |
| 70 | 1.2 (0.2–2.3) | 32.0 (27.2–36.8) | 0.2 (0.0–0.7) | 2.7 (0.0–6.4) |
| 60 | 1.4 (0.2–2.6) | 37.3 (31.7–43.0) | 0.3 (0.0–0.8) | 3.2 (0.0–7.5) |
| 50 | 1.7 (0.2–3.2) | 44.7 (38.0–51.5)† | 0.3 (0.0–1.0) | 3.8 (0.0–9.0) |
| 40 | 2.1 (0.3–4.0) | 55.9 (47.5–64.3)† | 0.4 (0.0–1.3) | 4.8 (0.0–11.3)† |
| 30 | 2.8 (0.4–5.3)† | 74.6 (63.4–85.8) | 0.6 (0.0–1.7)† | 6.3 (0.0–15.1)† |
| 20 | 4.2 (0.5–7.9)† | – | 0.8 (0.0–2.5)† | 9.5 (0.0–22.6) |
| 10 | 8.5 (1.1–15.9) | – | 1.7 (0.0–5.0) | 19.0 (0.0–45.2) |
*
CI = confidence interval; – = > 100% prevalence calculated.
†
Biologically plausible estimates of the true prevalence of respective Taenia species.