Non-Effect of Aureomycin on Eight Constituents of the Blood Stream of Hens Fed High and Low All-Vegetable-Protein Diets

This is the authors' abstract. We don't add key points for this paper.

IN GUATEMALA the poultry industry is dependent on all-vegetable-protein rations. Recent discoveries of the value of APF (Animal Protein Factor) supplements are important both to Guatemala and to many other areas of the American tropics. Work with baby chicks at this station (the Instituto Agropecuario Nacional of Guatemala) indicates that the efficiency of rations compounded of local indigenous feedstuffs is improved when supplemented with APF concentrates. No attempt will be made here to review the numerous reports of the use of antibiotics in poultry feeds. Whitehill et al. (1950) and Groschke and Evans (1950) have demonstrated the effect of antibiotics on baby chicks—on their growth, on the efficiency of their feed utilization, and on their intestinal flora. Halick and Couch (1951) and Couch et al. (1951) have shown the effect of antibiotics on production and hatchability of eggs. In the studies presented here, crystalline aureomycin was added to rations . . .