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I read the interesting report by Cialdini et al¹ in the ARCHIVES titled "The First South American Case of Diffuse Unilateral Subacute Neuroretinitis [DUSN] Caused by a Large Nematode." After the first description of DUSN by Gass et al,² some Brazilian articles appeared in the early 1990s reporting cases of the disease that were presented and discussed in several meetings by many professionals in the area, including the authors in the report aforementioned. Some of these cases were published in Brazilian magazines.

Dennis Orlock, MD, and I had the opportunity in 1997 to see a case similar to DUSN caused by a large nematode (1600-2000 µm) in a 16-year-old Brazilian girl who had been in close contact with a dog and who also had cutaneous larva migrans at initial examination.³ The Baylisascaris larvae could have been the cause in our case because the larvae of Toxocara and Ancylostoma caninum is . . . [Full Text of this Article]

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