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. 2020 Jun 19;16:204. doi: 10.1186/s12917-020-02423-2

Fig. 2.

Fig. 2

a. showing normal bursa of Fabricius. Control negative one-day-old chick. b. showing normal thymus. Control negative one-day-old chick. C. bursa of Fabricius showing variable degree of epithelial hyperplasia (arrow a) and ulceration (arrow b). Control infected group at 15 days post infection. d. Bursa of Fabricius showing variable degree of epithelial hyperplasia (arrow a) associated with degeneration and ulceration (arrow b). Control infected group at 15 days post infection. e. Bursa of Fabricius showing variable degree of epithelial hyperplasia associated with degeneration and sub cortical fibrous tissues proliferation. Control infected group at 15 days post infection. f. Thymus showing numerous holes on the cortex and medulla. Control infected group at 15 days post infection. H&E. a and b X 100 other Figs. X 200