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Old 07-13-2013
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First Aid Are these errors in FA? (2013, page 91)

They have Glossitis listed under niacin deficiency...but instead, shouldn't it be listed under riboflavin deficiency?

In addition, for niacin deficiency, it says Sever deficiency leads to pellagra (which I understand), but then it says...which can be caused by Hartnup disease. I know I'm being picky here, but isn't Hartnup just a mild form of niacin deficiency?

ok, nvm. i just did some googling around, and looks like it's correct. but wouldn't riboflavin simply be more associated with Glossitis as a hallmark feature? i just found it odd to see Glossitis not listed there, but it is added to niacin deficiency.

Last edited by ReggieMiller; 07-13-2013 at 07:10 AM.
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Old 07-14-2013
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In riboflavin deficiency there is also glossitis which gives characteristic magenta colored tongue.
As for pellagra it can be also caused by Hartnup disease, because in this case there is defective neutral amino acid transporters on renal and intestinal cells. Tryptophan (precursor of Niacin) is one of the neutral amino acid which is excreted. So decreased tryptophan absorption leads to low niacin and niacin deficiency itself causes pellagra
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