Avian encephalomyelitis in naturally infected pigeons in Turkey

Figures & data

Figure 1. Appearance of a naturally affected pigeon, 5 months of age, with torticollis.

Table 1. Clinical signs and necropsy findings in 11 naturally infected pigeons.

Case	Age	Clinical sings	Necropsy findings
1	3 months	Paralysis	Large white–greyish foci in the pancreas and kidneys, erosive-ulcerative foci with petechial haemorrhagia of the crop
2	3 months	Death	No finding
3	20 days	Death	Small white–greyish foci in the pancreas, erosive-ulcerative foci with petechial haemorrhagia of the crop
4	6 months	Torticollis, diarrhoea	Large white–greyish foci in the pancreas, pin-point white foci in the kidneys
5	6 months	Incoordination, head circling	No finding
6	2 months	Paralysis, tremor	No finding
7	2 months	Paresis, diarrhoea	Small white-greyish foci in the pancreas, pin-point white foci in the kidneys
8	5 months	Opisthotonos, tremor	Small white–greyish foci in the pancreas
9	12 months	Incoordination, diarrhoea	No finding
10	4 months	Paralysis	No finding
11	12 months	Diarrhoea	No finding

Figure 2. Large white–greyish foci extended across a lobe on the pancreas.

Figure 3. Mononuclear cell infiltration and cystic dilatation of exocrin glands in the pancreas. H&E, ×20.

Figure 4. Lymphoid follicular aggregations in the pancreas. H&E, ×20.

Figure 5. Gliosis and Purkinje cell degeneration in the molecular layer of the cerebellum. H&E, ×20.

Figure 6. Perivascular lymphocyte infiltrations and gliosis in the midbrain. H&E, ×20.

Figure 7. Central chromatolysis of the neurons (arrows) in the midbrain. H&E, ×20.

Figure 8. Intense FA-positive reactions in exocrin glands of the pancreas. ×20.

Figure 9. Abundant FA-positive neurons in the cerebral hemisphere. ×20.

Figure 10. Localizations of AE viral antigen in epithelial cells and infiltrated mononuclear cells in the crop. ×20.