猪只 2 型猪圆环病毒抗原免疫组织化学检测的显微图像

Photomicrograph of a lymph node from a pig affected by porcine circovirus 2 systemic disease (PCV2-SD). Note the large amount of PCV2 antigen (brown color) detected by immunohistochemistry. Hematoxylin counterstain; scale bar = 300 mcm.