Neuropathic gastric dilatation in psittaciformes

Area of Science:

• Avian pathology
• Veterinary neurology
• Virology

Background:

• Psittacine neuropathic gastric dilatation (PND) is a severe condition affecting cockatoos.
• Previous studies have indicated neurological involvement, but the causative agent remained unclear.

Observation:

• Four cockatoos with PND exhibited significant proventricular distention post-mortem.
• Microscopic examination revealed destruction of gastric and duodenal myenteric plexus ganglia, as well as the celiac ganglion.
• Intranuclear and extranuclear eosinophilic inclusion bodies were observed in affected neurons.

Findings:

• Electron microscopy identified virus-like particles within and outside the inclusion bodies.
• These particles exhibited characteristics consistent with paramyxovirus.
• The findings strongly suggest paramyxovirus as the causative agent of PND in cockatoos.

Implications:

• This research identifies a specific viral etiology for a previously poorly understood avian disease.
• Understanding the role of paramyxovirus in PND can guide future diagnostic and therapeutic strategies.
• Further research into paramyxovirus pathogenesis in psittacine birds is warranted.