11. Pellagra was common among prisoners of Soviet labor camps ( the Gulag ).12. In the early 1900s, pellagra reached epidemic proportions in the American South. 13. However, he failed to identify a specific element whose absence caused pellagra . 14. Pellagra seems to be especially common in patients with corn-based diets.15. These workers stamped out malaria, pellagra , and typhoid fever from many areas. 16. Hartnup disease is a genetic disorder that reduces tryptophan absorption, leading to pellagra . 17. Pellagra causes diarrhea, dermatitis, weakness, mental confusion, and eventually dementia.18. Another disease common to South Africa is pellagra . 19. Some conditions can prevent the absorption of dietary niacin or tryptophan and lead to pellagra . 20. Pellagra was first described for its dermatological effect in Spain in 1735 by Gaspar Casal.
