Figure 7
Autopsy histopathology of designated viruses-infected ducks. A At day 5 post-infection with the designated viruses (DPV CHv50, DPV CHv-gIN69/78/265A, DPV CHv-gIN69/78/265A repair, and MEM), ducks were subjected to necropsy, and histopathological lesions in various tissues were documented. B Histological analysis of the heart, liver, spleen, glandular stomach, duodenum, cecum, bursa of Fabricius and thymus after infection with designated viruses. (haematoxylin and eosin staining, 100 × magnification). C Records of the characteristic features of ducks' heads during the disease phase following infection with the designated viruses. (D) Infection with DPV CHv50 leads to atrophy of the thymus. Each group's thymus area of ducks was scanned and measured using ImageJ. The results were calculated based on the thymus area of the control group ducks on the 5th day as 100% (ns, P > 0.05; *, P < 0.05; **, P < 0.01; ***, P < 0.001; ****, P < 0.0001; t-test).