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Migration of Baylisascaris procyonis into the vitreous
  1. O F M Brasil,
  2. H Lewis,
  3. C Y Lowder
  1. Cole Eye Institute, The Cleveland Clinic Foundation, Cleveland, OH 44195, USA
  1. Correspondence to: Careen Y Lowder Cole Eye Institute, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA; lowderc{at}

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Diffuse unilateral subacute neuroretinitis (DUSN) is a clinical syndrome first described by Gass and associates in 1978, characterised early by visual loss, vitritis, papillitis, and recurrent crops of grey-white retinal lesions and later by progressive visual loss, optic atrophy, retinal vessel narrowing, and diffuse retinal pigment epithelial degeneration.1,2

Baylisascaris procyonis, the common intestinal raccoon roundworm, is believed to cause DUSN and its potential to affect ocular tissue has also been described in animal models.3–5

We describe a case of infection by Baylisascaris procyonis where the larva was found entrapped in the vitreous.

Case report

A 37 year old white man presented for a second opinion. He had experienced flashes and floaters in the left eye for 10 days. …

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