Figure 629

Onchocercosis. A, The parasite Onchocerca volvulus deposits lesions in tissues. (Hema-toxylin-eosin stain X 150.) B, Associated mesangial proliferative lesion. This lesion represents a TH1 predominant state. Some patients, however, develop an autoimmune reaction that leads to progressive glomeru-lonephritis. (Hematoxylin-eosin stain X 175.)

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