Table 3.
Change in apparent sero-prevalence from 2014 to 2017 of ELISA positive, primiparous and multiparous animals in a study of MAP infection in a South Canterbury dairy herd over 4 years of intervention
| Season | Primiparous cows in herd | Multiparous cows in herd | Animals seropositive for JD | |
|---|---|---|---|---|
| Percentage (95% CI) Primiparous animals | Percentage (95% CI) Muliparous animals | |||
| 2013–2014 | 260 | 862 | 15 (10.7–19.3) | 30 (26.9–33.0) |
| 2014–2015 | 336 | 733 | 4 (1.8–5.9) | 13 (10.5–15.4) |
| 2015–2016 | 327 | 810 | 7 (4.5–10.2) | 6.3 (4.6–8.0) |
| 2016–2017 | 275 | 755 | 2.6 (1.0–4.4) | 2.3 (1.2–3.3) |