Suspect red mite may be rampant at the moment. Found it in the hen house recently and it took some very serious effort to get shot of it. Mentioned it to a couple of other people locally who were sure that they were clear of it, but close inspection proved otherwise.
Like chrismahon, I was stripping off at the back door and putting all my clothes in the wash after cleaning the hen house. Even thinking about it is making me itch. Hope it hasn't managed to get into the house, that would be awful.
We have a wooden hen house and I used ant powder under the eves, under the floor and dusted the roof when all was clear as a precautionary measure, then was astonished to see dead mites on the roof the following morning.
Checking daily at the moment, and so far all clear. Not nice.