Summary

We present a case of optic neuritis and myelo-radiculopathy as a late association following Chlamydia psittaci infection. A 45-year-old female patient with a prior history of C psittaci pneumonia and subsequent reactive arthritis presented to the neurology unit with severe headache, constitutional symptoms and monocular disturbance in vision. Clinical examination revealed focal signs with brisk upper limb reflexes compared to lower limbs and mild left-sided pyramidal signs. Systemic inflammatory markers were raised and serological studies showed no evidence of re-infection. MRI showed multiple high signal foci within the brain parenchyma and pachymeningeal thickening and enhancement. There was marked clinical and haematological improvement with high dose corticosteroids.