Q:

Is it possible to become a vampire because you consume vampire dust

Could it be possible that i became a vampire by consuming too much vampire dust?  
I was never hit by a vampire (sneaking thief bastard) but i contracted it after the morthal mission and consuming the various vampire dust ingredient i found on site. 
Obviously i noticed it and reloaded and cured the disease before getting my final vampire form...

A:

When they do their life drain effect you have a chance to contract it I believe.   Shouldn't be anything related to the dust, least nothing that I've ever read.