Figure 1From: Greater numbers of nucleotide substitutions are introduced into the genomic RNA of bovine viral diarrhea virus during acute infections of pregnant cattle than of non-pregnant cattleExperimental overview and source of viruses. A. BVDV-naïve, pregnant dams in the first trimester of pregnancy were exposed to PI calves. Viruses were isolated from the progenitor and progeny PI calves and from the dams six days post-exposure. B. BVDV naïve cattle were exposed to PI calves. Viruses were isolated from the PI calves and from the acutely infected cattle at 13 days post-exposure. C. Viruses were isolated from a PI dam and its PI calf.Back to article page