ANN 111: Principles of Animal Nutrition and Feed Technology (2+1)

DEFICIENCY

• In pigs, deficiency symptoms include poor growth, anorexia, enteritis, vomiting and dermatitis.
• In fowls a deficiency of the vitamin causes bone disorders, feathering abnormalities and inflammation of the mouth and upper part of the oesophagus.
• Deficiency symptoms are particularly likely in pigs and poultry if diets with a high maize content are used, since maize contains very little of the vitamin or of tryptophan
• Pellagra is commonly observed in human population where is predominant part of diet.