I have a mouse flea, it is very tiny black speck that molts 5 times, so much black speck debris. Hard to find one that is commming out of ts shell, but finally I have a secmine. People with the same thing I have must be bringing in debris( THAT looks lke dirt) or the etymologist is not dissecting it. Anyway the CDC is corrupt, I believe. How will they ever handle a bio attack? They must be investigated ASAP, if they fouled even this issue.