I mentioned the mysterious Rash in a column last week, and heard from many gratified people who’d suffered the pain and itch, wondering what the devil they picked up out there. One of the readers forwarded a letter from a doctor. For what it’s worth:

Here is a simple answer.  Soil has bacteria in it and some soils have more nasty bacteria in them than others when it comes to human health.  The dust that is kicked up by a large group of people circulates such bacteria and then your skin has an allergic reaction.  Your skin and digestive system normally is made up of bacteria providing some positive services to the human body.

So it’s “kicked-up bacteria,” which, as Dave Barry says, would make an excellent name for a rock group. Maybe one of those country-punk bands.