Given that you bothered to reference "lenght (sic) of time," I find it disheartening that you have also demonstrated apparent failure to comprehend or intelligently consider bounding problems, population density, transmission risks and rates, practical effects of seemingly low mutation rates, microbiology, and systems thinking. In short, all activities involving large scale administration of antibiotics to livestock at dosages resulting in appreciable treatment/prevention efficacy are practices which drive substantial and increasing risks to public health.
The math doesn't lie, and the trending curves of probabilities associated with widespread epidemics aren't exactly uplifting. I'll make a preemptive recommendation that you suppress the urge to post anything resembling a cliché "citation needed" response here. Given the circumstances at hand, devotion of your time to even a cursory review of the aforementioned subject matter would likely be a more productive activity. Such study will necessarily involve your review of all citations referenced in said materials, review of nested citations, etc. You wouldn't want to compound foolishness with yet more foolishness, would you?
I'm willing to admit that I may be entirely wrong in my assessment of your level of knowledge, with the corollary that you are simply betting that your benefits will outweigh your risk in this area for the duration of your lifespan. However, given that I know nothing of your mode of living or the measures of your personal resource reserves on hand for reaction/relocation/adaptation/insulation in response a large scale communicable disease crisis, I must hazard a guess that you're either (A) dangerously ignorant of reality or (B) very well prepared to deal with things turning shitty in a hurry. It is my measured estimation that the odds of your membership in the intersecting set are quite low, given your mid-range UID and the generally incongruous nature of the respective attributes of the A and B sets.