Bill Harvey discusses last week's condition (25.06.10)
The image last week (Figure 1) shows a large distinct chorioretinal atrophic lesion centred around the macula.
The pigmentation suggests it is likely to be longstanding. The central placement and the distinct margins are characteristic of a chorioretinitis event and one cause that tends to affect the macula is infection with Toxocara. Toxocara is a species of nematode worm commonly found in pet faeces. It is most commonly associated with dogs (T canis) but also may be found in cat faeces (T felis).
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