Skip to main content
. 2020 Sep 28;99(12):6542–6548. doi: 10.1016/j.psj.2020.09.037

Figure 2.

Figure 2

The pathogenicity to the bursa of commercial broilers induced by the IBDV novel variant strain SHG19. (A) The maternal antibody titer of IBDV at 12 and 21 d of age. (B) The bursae image and the BBIX value of infection and control groups at 4 d post-infection (day p.i.). (C) The bursae image and the BBIX value of infection and control groups of vaccinated broilers at 21 d p.i. (D) The histopathological appearance of the bursal sections (hematoxylin and eosin staining) of infected and control groups at 4 d p.i. The follicle atrophy (black hollow arrow), interstitial hyperplasia (black thin arrow), and lymphopenia (white hollow arrow) that occurred in the bursa of the infected group are shown. (E) The histopathological appearance of the bursal sections of the infected and control groups of vaccinated broilers at 21 d p.i. Lymphocyte decreasing (black thin arrow) was observed in the infected group. The mean value from 20 (A), 10 (C), or 5 (B) independent samples are shown (∗∗P < 0.01). Abbreviations: BBIX, bursa:BW index; d p.i, days post-infection; IBDV, infectious bursal disease virus.