I beleive you! I had dairy culture mites in my mouth and all over my body, and in my blood. FACT!
Here is a picture: And they never left red marks either.
I have not read the rules for this site, so I can not share my story here, so if you contact me, click on my name, i will tell you my story.
But don't be afraid. Actually they are just part of this world we live in, we were just lucky not to get them before....or notice, i am not sure which....lol...scarey though..........Don't Be afraid!