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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

From: Control of Mycobacterium avium subsp. paratuberculosis infection on a New Zealand pastoral dairy farm

SeasonPrimiparous cows in herdMultiparous cows in herdAnimals seropositive for JD
Percentage (95% CI) Primiparous animalsPercentage (95% CI) Muliparous animals
2013–201426086215 (10.7–19.3)30 (26.9–33.0)
2014–20153367334 (1.8–5.9)13 (10.5–15.4)
2015–20163278107 (4.5–10.2)6.3 (4.6–8.0)
2016–20172757552.6 (1.0–4.4)2.3 (1.2–3.3)