Nutritional Studies with the Duck

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Abstract
The effects of nicotinic acid, thiamine, choline, and vitamin A deficiency on the course of P. lophurae infections in chicks and ducklings are reported. In chicks, vitamin A deficiency appears to cause a somewhat milder infection and choline deficiency may have the opposite effect. Thiamine deficiency appeared to have no influence on the infection. Nicotinic acid deficiency resulted in a much more severe infection. The percentage of parasitized cells was from four to five times greater in the deficient birds. Both deficient and nondeficient birds were able to clear the blood stream of parasites in approximately the same length of time. In ducks none of the deficiencies influenced the course of the infection to a marked degree. The duck is probably too susceptible to this infection to be a satisfactory experimental animal.

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