Table 2. Proportion of seropositive cattle in the herds sampled.
| Sampling area | Herd ID | When last known anthrax case was detected | When last vaccinated before samplinga | Date of sample collectiona | Mean (SD) anti-PA Ab (EUa) | No. of samples tested |
No. positive | % positive (95% CI) | |
|---|---|---|---|---|---|---|---|---|---|
| Western Province | 1 | No cases | Dec-2013 | Oct-2016 | 0.428 (0.292) | 11 | 2 | 18.2 (−4.6, 41.0) | |
| 2 | Nov-2013 | Dec-2013 | Oct-2016 | 0.277 (0.181) | 39 | 1 | 2.6 (−2.4, 7.5) | ||
| 3 | No cases | Dec-2013 | Oct-2016 | 0.270 (0.138) | 32 | 0 | 0 (0.0, 0.0) | ||
| 4 | Nov-2013 | Jan-2014 | Oct-2016 | 0.454 (0.201) | 22 | 3 | 13.6 (−0.7, 28.0) | ||
| 5 | Nov-2013 | Jan-2014 | Oct-2016 | 0.319 (0.150) | 25 | 0 | 0 (0.0, 0.0) | ||
| 6 | Nov-2013 | Jan-2014 | Oct-2016 | 0.396 (0.212) | 16 | 2 | 12.5 (−3.7, 28.7) | ||
| 7 | Jan-2014 | May-2015 | Oct-2016 | 0.427 (0.217) | 33 | 5 | 15.2 (2.9, 27.4) | ||
| 8 | Jan-2014 | May-2015 | Oct-2016 | 0.495 (0.259) | 9 | 2 | 22.2 (−4.9, 49.4) | ||
| Total | 0.358 (0.207) | 187 | 15 | 8 (4.1, 11.9) | |||||
| Lusaka Province | 9 | No cases | NA | Oct-2016 | 0.744 (0.268) | 21 | 9 | 42.8 (21.7, 64.0) | |
| 10 | No cases | Nov-2015 | Apr-2017 | 0.430 (0.196) | 28 | 4 | 14.2 (1.3, 27.3) | ||
| 11 | No cases | Oct-2014 | Oct-2016 | 0.254 (0.173) | 35 | 2 | 5.7 (−2.0, 13.4) | ||
| 12 | No cases | Nov-2015 | Sep-2016 | 0.636 (0.209) | 23 | 7 | 30.4 (11.6, 49.2) | ||
| 13 | No cases | Oct-2014 | Oct-2016 | 0.335 (0.167) | 24 | 2 | 8.3 (−2.7, 19.4) | ||
| Total | 0.452 (0.268) | 131 | 24 | 18.3 (11.7, 24.9) | |||||
aDates; month-year.
NA; not available.