The Mode of Action of Antibiotics in the Nutrition of the Dairy Calf. II. Effect of Aureomycin Administered Orally to Young Dairy Calves on the Sensitivity of Intestinal Bacteria to Phagocytosis

At least a part of the effect of antibiotics on growth is due to their effect on the physiology of bacteria in such a manner as to make the bacteria more susceptible to the body defense mechanisms and thereby less detrimental to their host. It is likely that under different environmental conditions certain species of bacteria may be more affected than others. Editor.