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Histopathology and Cytology of
Poultry Diseases By Ivan Dinev, DVM, PhD
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INFECTIOUS BURSAL DISEASE (GUMBORO)
Fig. 1. Almost complete disappearance of the normal follicular structure of B. Fabricii, resulting from severe degenerative necrobiotic lesions and inflammatory cell infiltration. H/E, Bar = 70 µm.
Fig. 2. Marked interfollicular inflammatory oedema, haemorrhages and inflammatory necrotic lesions in the medullary zone of bursal follicles. H/E, Bar = 100 µm.
Fig. 3. Fragment of Fig. 2. Inflammatory necrotic detritus among the B. Fabricii follicles. H/E, Bar = 50 µm.
Fig. 4. Sometimes, in the medullary zone of follicles, cystic cavities could be formed that contain exudate, imflammatory cells and detritus mass. H/E, Bar = 35 µm.
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