Effect of boosting in pigs after a period of non-exposure.

<p>Evolution of the anti-<i>G. m. morsitans</i> saliva IgG responses and the anti-rTsal1 IgG repsonses was evaluated in pigs (<i>n</i> = 2) originally exposed two-weekly for 6 weeks to the bites of 3 flies ( = low exposure group) and re-exposed to the bites of 10 flies (indicated by an arrow) after a 2-month period of non-exposure. One non-exposed animal sampled during the priming experiment (<a href="http://www.plosntds.org/article/info:doi/10.1371/journal.pntd.0002911#pntd-0002911-g005" target="_blank">Figure 5</a>) served as a negative control. Presented data are mean ΔO.D._{450 nm} values with the 95% CI obtained with a 1∶1600 dilution of the individual plasmas.