Abstract
Antibiotics added to the diet of chickens tend to improve the utilization of calcium and phosphorus (Lindblad et al., 1952) and increase the percentage of bone ash (Ross and Yacowitz, 1952).Slinger et al. (1953) reported that the addition of penicillin to certain diets for turkeys decreased egg weight slightly but not significantly. They did not determine what part of the egg was influenced most. Gabuten and Shaffner (1953) reported that penicillin fed at the level of 15 and 30 parts per million to chickens for two or more weeks increases specific gravity of egg, shell breaking-strength and blood calcium. If acetylcholine and ephedrine are injected when an egg is in the oviduct, certain components of the subsequently-laid eggs are changed, (Sturkie Weiss and Ringer, 1954). This report concerns the effects of penicillin injected during the period of egg formation on components of the egg and blood calcium. PROCEDUREWhite …
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