Well...
I didn't make this statement, however, I am guessing the line of reasoning would include something along the lines of...
b/c of factory farming and the desire to make cows bigger at any means (hormones), sometimes these cows develop infections b/c their immune systems are compromised and also b/c with females their udders rub on the ground. Thus, cows are injected with antibiotics to fight infection which is then, in addition to the hormones, passed down to whatever animal ingests said cow.
Bacteria is then being presented with weak forms of antibiotic in humans in this case, which it can adapt to and ultimately conquer.
Eventhough I don't eat red meat or poultry because of the added hormones and antibiotics, I am thinking that over reliance on prescription drugs for every health issue and the subsequent poor compliance with instructions are the larger problems in this situation.
RL