Livestock: Antibiotics Tim Farron To ask the Secretary of State for Environment, Food and Rural Affairs what recent estimate he has made of the level of use of the practice of using antibiotics as a surrogate for growth promoters in livestock. Jim Fitzpatrick Following the ban of antimicrobial growth promoters by the EU in 2006, DEFRA is not aware of any evidence to suggest that farmers are using antibiotics as replacements for antimicrobial growth promoters.