Fig. 1From: The effect of sub-clinical infection with Mycobacterium avium subsp. paratuberculosis on milk production in a New Zealand dairy herdPredicted milk yield for multiparous and primiparous cows in 2013–14 (a) and 2014–15 (b) from a model investigating the effect of MAP infection status on milk yield. Ninety-five percent confidence intervals for the observed milk yield at each of four test dates in each lactation are represented by vertical lines in each lactationBack to article page