Odor is particulate as are the germs and bacteria that are aerosolized with the poop. Most restrooms can’t be smelled 5 or 10 miles away...unless I’ve had some habenero sauce on eggs.....
If the public were as alarmed by this as they can tend to be about radiation, a lot of the bizarre and stupid misuse and overuse of antibiotics would not have occurred, because the sickness that compelled the ill advised treatment would never have been prescribed.
Agricultural overuse of antibiotics is another issue, but the potentially dire aftereffects are the same.
Untreatable contagion. It's a matter of time, and it's largely a plague of our own making. We had practically every serious bacterial threat under control or even eradicated for all intents and purposes. But, we couldn't leave well enough alone, started shooting everything full of antibiotics for reasons unrelated to human health.