A vitamin deficiency disease (due to lack of niacin), often found in maize- or millet-dependent populations. A dermatitis, initially resembling sunburn, but followed by thickening, scaling, and pigmentation, is characteristic; internal epithelium is affected (sore tongue, diarrhea). Confusion, delirium, hallucination, and ultimately dementia may ensue. Niacin replacement is essential and food enrichment is an important preventative measure.
Related category HEALTH AND DISEASE
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