The Guardian reports [theguardian.com] that according to a Bureau of Investigative Journalism study colistin, an antibiotic of last resort, is used by tonnes in Asian agriculture to make the poultry gain weight a little bit faster. And all of this is perfectly legal. The World Health Organization (WHO) calls antibiotic resistance [wikipedia.org] "a major threat to public health".
Another reason to eat less meat I guess. Like we needed one.