The Vitamin A Reserve of Diseased Fowls

Abstract THE relationship of vitamin A deficiency to infectious diseases in the fowl has been given attention during recent years. Elvehjem and Neu (1932) studied symptoms associated with vitamin A deficiency in the chick and also reported early work by other investigators. Seifried (1933) found vitamin A deficiency in poultry was followed by a high incidence of infestation with internal parasites. Murphy, Hunter, and Knandel (1938) reported that cod liver oil added to the ration of pullets apparently increased their resistance to coccidiosis. Chichester, Russell, and Hudson (1938), in an extensive study of the livers from diseased birds autopsied over a period of two years, found no significant grouping of diseases according to the amounts of vitamin A found in the livers. In a recent study Rubin, Bird, and DeVolt (1941) investigated vitamin A deficiency in commercial poultry flocks by assaying 80 livers for their vitamin A content and concluded that . . .

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