IFN-y Elispot results, related to inoculation and to parturition. Average data for PBMCs stimulated with Phase 1 and Phase 2 antigen. Data were corrected for medium-incubated cells and expressed as a percentage of ConA-stimulated cells. A: data were related to inoculation. Solid bar: delivery period of the Coxiella-inoculated goats; dotted bar: delivery period of the control goats. B: data related to delivery. (■) Coxiella-inoculated goats; (−) negative control goats; *: P ≤ 0.05; **: P ≤ 0.01.