Phytogenies: successful AGP replacement in swine diets

摘要

In 1928, Alexander Fleming made an important observation of antibiosis against bacteria by a Penicillium fungus. Prior to this discovery, treatments for infections were based primarily on traditional medicine. The first commercially available antibiotic was developed in the following decade and the growth-promoting properties of such antimicrobial agents were discovered in the late 1940s. After that, the practice of feeding sub-therapeutic doses was very successfully adopted and became routine in livestock diets, in spite of Fleming's extensive speeches on the dangers of using antibiotics at low concentrations or during short periods of time.