Studies and facts on use of antibiotics in animals suggest that animal sources contribute little to the problem. The current pursuit of zero risk by banning some antibiotics in Europe is not a sensible precaution but rather an abdication of responsibility based on science. B y definition, bacteria are selected for resistance when exposed to an antibiotic. This natural biological process, which results in the survival of the most resistant strains, was observed long before the discovery of penicillin.
Some bacteria are also already naturally resistant to certain antibiotics.
Penicillin, for example, does not affect the Salmonella species. But misuse of antibiotics has speeded up these natural processes, resulting in antibiotic resistant bacteria. This is an emerging issue for modern agriculture. The prudent use of these valuable products in accordance with their terms of authorization and the manufacturers recommendations is essential in order to maintain their effectiveness. The main concern is that a number of human pathogens have become resistant to antibiotics.