Table 2.
Observed and true Rift Valley fever animal prevalence, associated exact 95% Confidence interval for two-stage cluster sampling and within sampling site prevalence by region
| Region | Positive animals/No sampled | Observed [true] prevalence* (%) | 95% Confidence interval (%) | Within site prevalence range (%) |
|---|---|---|---|---|
| Wilayas |
4/356 |
0.92 [0.95] |
0.25 – 3.38 |
0 – 2.47 |
| Bir Lehlou |
1/90 |
0.69 [0.70] |
0.09 – 4.83 |
0 – 1.14 |
| Tifariti |
4/89 |
4.96 [5.29] |
1.88 – 12.44 |
0 – 7.69 |
| Mehaires |
1/84 |
1.22 [1.27] |
0.17 – 8.21 |
0 – 7.14 |
| Mijek |
0/81 |
0 [0] |
0 – 0 |
0 – 0 |
| Agwanit |
0/94 |
0 [0] |
0 – 0 |
0 – 0 |
| Dougaj |
0/85 |
0 [0] |
0 – 0 |
0 – 0 |
| Dahkla |
1/103 |
1.75 [1.84] |
0.24 – 11.48 |
0 – 1.75 |
| TOT | 11/982 | 0.97 [1.00] | 0.33 – 2.85 | 0 – 7.69 |
*Adjusted Wald test between region (d.f. 7, 974) (p = 0.0001).