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Pathological section for lymph node. A: Normal lymph node. B: Lymph node from sPCV-inoculated mouse, 28 days PI. Necrosis for lymphoid nodule and present vacuolus (arrows). C: Lymph node from mPCV-inoculated mouse 42 days PI. Necrosis for lymph node and low-grade fibrosis (arrows). HE staining, ×200.
