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

Evolution of the anti-G. m. morsitans saliva IgG responses and the anti-rTsal1 IgG repsonses was evaluated in pigs (n = 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 (Figure 5) 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.