Story Time
One day I sat in a microbiology lecture and a woman came in who introduced herself as a researcher. She asked us if we'd agree to participate in a study about MRSA in medical and agriculture students. We all agreed and she took swabs of our mouths and noses. We asked her: "How many of us do you think will have MRSA?" We were about 50 medical students. All of us had worked at least three months in nursing. Some of us worked as nursing assistants on weekends. Some were licensed nurses, even. The scientist said: "Well, we test bio undergrads, too. They are the control group as they've only come into contact with antibiotics and infected people as much as the average population. We haven't found MRSA on any of them so far. You guys have had some contact with patients and antibiotics, but from my experience I'd say perhaps one out of the fifty of you will test positive. The agricultural students, however - oh they have MRSA." She didn't give us any numbers as her work wasn't finished yet. She only said she regularly found MRSA on agricultural students. She came back a week later with our results. None of us were positive.
Note: This isn't meant to diminish the importance of hygiene and careful use of antibiotics in medicine. But as someone who cares about public health, I think it is important to note that medical providers for humans aren't the only ones who cause multiresisting strains of bacteria, nor can we solve this problem on our own.