See here the presentation from Prof Moritz van Vuuren on The challenges of anti-microbial’s in animal husbandry:
Managing the global challanges of anti-microbials in animal husbandry Prof Moritz van Vuuren
See here the presentation from Prof van Vuuren on the principles of responsible use of anti-microbial’s in production animals:
Principles of responsible use of anti-microbial drugs in production animals M van Vuuren