Onchocerciasis-associated morbidity: hypothesis.
Tissue concentrations of vitamin A in Onchocerca volvulus are about 8 times higher than those of the host. About 100,000 microfilariae (mf) die every day in heavily infected persons. Onchocerciasis-associated morbidity may be due in part to the release of retinoids from dying mf and their gradual accumulation to toxic concentrations in affected tissues.
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