Skip to main content

Table 5 GEE prediction of probability of a positive ELISA test result (≥ 50 EU in any one of 4 ELISA tests conducted in parallel) for primiparous compared to multiparous cows over 4 years of whole herd testing for MAP infection on a NZ pastoral dairy farm over 4 seasons (2013–2017)

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

Predicted probability (95% CI) of testing ELISA positive
SeasonPrimiparousMultiparousp-value of difference
2013–201415.7% (11.1–22.1)42.8% (37.1–49.4)< 0.001
2014–20153.8% (2.1–6.8)15.6% (12.8–19.0)< 0.001
2015–20167.8% (5.0–11.9)8.1% (6.4–10.3)0.870
2016–20172.6% (1.2–5.3)2.6% (1.7–4.0)0.946