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Viral genome load in house sparrow tissues. Viral load is plotted against each tissue analyzed by semi-quantitative real-time RT-PCR. He = heart; Li = liver; Br = brain; Ki = kidney; Sp = spleen. Each group of eight house sparrows was sampled as described in the text. Horizontal bars represent the mean Ct value of each tissue. Arrows indicate tissues from dead house sparrows. (*) only four spleens were sampled.
