Observed and predicted weekly MAIR and number of BT8 cases in the Aisne <i>département</i>.

<p>The observed mid-term abortion incidence rate, MAIR_<i>ijw</i> (in grey), was computed for heifers (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0119012#pone.0119012.g002" target="_blank">Fig. 2A, on</a> the left) and parous cows (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0119012#pone.0119012.g002" target="_blank">Fig. 2B</a>, on the right) as the ratio of the observed number of mid-term abortions to the number of at-risk female-weeks. The predicted MAIR (solid pink line) and predictive intervals (dashed pink line) were estimated by modeling the MAIR according to time and the BT8 covariate averaged over a <i>département</i>-specific time interval (with the candidate model having the lowest QAIC, M2). The number of clinical BT8 cases is plotted in black.