 with 00-fold dilutions of BTV-0. The number of PFUs inoculated is indicated on each survival group. Virus was extracted from blood and determined as described in [Materials and Methods](#s0){ref-type="sec"}. Each point represents the mean values of the viral titer of six animals, and standard deviations are shown as error bars.](pone.0000000.g000){#pone-0000000-g000}  