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Table 1 The histopathological scoring of bursa of Fabricius of chicken examined in all four groups

From: The ameliorating effect of some immune-stimulants on bursal and tracheal lesions of broiler chickens challenged with ND virus

  Group I Group II Group III Group IV
Hyperplasia of bursal epithelium 12 birdsa
+++b
18 birdsa
+++b
20 birdsa
+++b
20 birdsa
+++b
Thickening of interfollicular stroma with inflammatory cellular infiltration 10 birdsa
+++b
16 birdsa
+++b
18 birdsa
+++b
20 birdsa
+++b
Lymphoid depletion of lymphoid follicles 20 birdsa
++b
12 birdsa
++b
10 birdsa
++b
13 birdsa
++b
Tightly packed lymphoid follicles 9 birdsa
++b
13 birdsa
++b
16 birdsa
+++b
12 birdsa
+++b
Epithelised follicular cysts 19 birdsa
++++b
8 birdsa
+++b
15 birda
+b
13 birdsa
++b
Medullary cyst 15 birdsa
+++b
11 birdsa
++b
0a
0b
20 birdsa
+++b
Pyogranuloma 0a
0b
0a
0b
0a
0b
1 birda
+b
  1. aNumber of examined birds
  2. bThe severity degree of lesions designated as follows (Muskett et al., 1979): complete loss of follicular architecture and fibroplasias +++++, very severe ++++, severe +++, moderate ++, mild +, no damage 0