Viral antigen detection in mice after SADS-CoV infection. Viral antigens (orange arrows) in the heart, lungs, liver, spleen, kidneys, stomach, small intestine, large intestine, and brain were detected using a rabbit anti-SADSr-CoV N protein polyclonal antibody (red). Images were acquired using a Pannoramic MIDI system. Scale bars: 50 μm (heart, lungs, liver, spleen, and kidneys) and 100 μm (stomach, small intestine, large intestine, and brain).