• Highly contagious avian viral disease (zoonotic)
• Causative agent: Avian paramyxovirus type-1 (APMV-1)
• Virus characteristics:
  • Single-stranded RNA virus
  • Size: 120-300 nm (typically 180 nm)
  • Contains hemolysin enzyme

1. Neurogenic Form:
   • Incubation: 4-6 days
   • Respiratory/neurological signs
   • Wing drooping - Head twisting - Circling
2. Ocular Form:
   • Periocular swelling
   • General lethargy
3. Auditory Form:
   • Mainly affects growing birds
4. Skeletal Form:
   • Wing paralysis - Lameness
5. Enteric Form:
   • Cessation of egg production
   • Watery green diarrhea

• Virus strain virulence
• Vaccination status
• Environmental conditions
• Flock health status

1. Strict isolation of infected birds
2. Antipyretics (if febrile)
3. Supplementation:
   • Vitamin E + Selenium
   • Vitamin D
4. Anti-inflammatory (Corticosteroids)
5. Supportive antibiotics
6. Vaccination (most critical)

Note: Treatment often yields unsatisfactory results