He would have to be re exposed all the time.
I am questioning if this is scabies.
There is no such thing as a carrier.
I think there is a misdiagnosis.
The lesion should be send to the lab, or the doctor needs to clearly identify the mite with magnification.
OK, so you might have more questions or want to give me more information: Please use reply to expert if you have further questions. When you are ready, please click a positive rating [hopefully excellent—that’s how we are paid, per rating]. If you forgot something, come back. I am here http://www.justanswer.com/medical/expert-dr-thomas/
You never gave a positive rating on my answer.
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Please do that now.