Figure 2. . Individual cycle threshold (Ct) values of real-time quantitative reverse transcription PCR (RT-qPCR) in 50 female lambs at time of natural infection by Schmallenberg virus. Ct values of lambs that tested positive once (single responders, n = 40) and those of lambs that tested positive twice during a 2-week interval (double responders, n = 10) are shown. Each symbol represents 1 lamb.
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