ABSTRACT
Psittacine neuropathic gastric dilatation was studied in four cockatoos (Cacatua spp.). The birds died with characteristic clinical signs, and post-mortem examination revealed a highly distended proventriculus. Upon light microscopic examination, most of the ganglia of the gastric plexus and some of the duodenal myenteric plexus appeared destroyed and replaced by round cell accumulations; the same was true for the celiac ganglion. The neuronal perikaryon of the celiac ganglion and the myenteric plexus revealed intranuclear and extranuclear eosinophilic inclusion bodies. The electron microscope revealed virus-like particles outside and within those inclusions. These particles were similar to particles described and identified as paramyxovirus.
Subject(s)
Autonomic Nervous System Diseases/veterinary , Bird Diseases/pathology , Gastric Dilatation/veterinary , Psittaciformes , Animals , Animals, Domestic , Autonomic Nervous System Diseases/pathology , Gastric Dilatation/pathology , Inclusion Bodies, Viral/pathology , Stomach, Avian/innervation , Stomach, Avian/pathologySubject(s)
Coronaviridae Infections/veterinary , Intestines/innervation , Rotavirus Infections/veterinary , Submucous Plexus/pathology , Swine Diseases/pathology , Animals , Coronaviridae Infections/pathology , Diarrhea/pathology , Diarrhea/veterinary , Gastroenteritis, Transmissible, of Swine/pathology , Rotavirus Infections/pathology , SwineABSTRACT
In context with the first light and electron microscopic description of a spontaneous esthesioneuroepithelioma in a dog (10 year old female Labrador) general morpho- and etiopathogenetic problems concerning olfactory neoplasias were discussed. Because of its specific location and growth pattern, especially the development of true rosettes and pseudo-rosettes, the tumor was evaluated light microscopically as an esthesioneurogeneic one. The final classification was based upon ultrastructural peculiarities, as occurrence of ciliar structures, characteristic intercellular junctions, and the - although rare - appearance of dense cored vesicles.