Nowadays the meat industry and its customers demand for a reduction in antibiotic usc in animals. They ask for further efforts from the production level to reduce the risk of antibiotics resistance. In that matter the EU commission since 2007 has presented its guideline named "prevention is better than cure"; Japan defined new standards for export trade regulations; Carrefour developed special codes of production. Following this requirement of reduction of antibiotic use, pig production should stay technically and economically attractive. The following survey analyses the differences between farms in which oral vaccination against ileitis was introduced and corollary the antibiotic regime reduced (group A), in comparison with farms that implemented vaccination against ileitis without a subsequent change in the antibiotic protocol (group B).