Figure 4From: Transplacental transmission of field and rescued strains of BTV-2 and BTV-8 in experimentally infected sheepProduction of anti-BTV antibodies in ewes. Serum samples collected on the indicated days from inoculated ewes were assayed for the presence of anti- BTV antibodies using an ELISA as described in Materials and methods. The horizontal bars indicate the boundary between positive and negative sera, values which fall within the bar are considered inconclusive.Back to article page