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Retinopathy Globe Enlarged

Retinopathy globe enlarged (RGE) is an autosomal recessive disease that affects the Rhode Island Red chicken breed. The disease is characterized by progressive retinal degeneration resulting in blindness by the time the chick is 4 weeks of age. In the early 1980s, approximately 0.2% of chickens in several commercial flocks in the United Kingdom had RGE. Affected chickens exhibit a poor pupillary light response and development of cataracts.

Clinical Signs

Blindness

Diagnosis

  • History
  • Clinical signs
  • Eye exam

Treatment

Supportive care

Prevention

Scientific References

    Age Range

    It occurs in chicks by the time they are 4 weeks of age.