If she has morgellons she was not delusional.Researchers have not identified it yet. It is microscopic. it could be a bacterial parasite or a protozoa. But your girlfriend would also have had lyme disease too.
the new book called morgellons by dr. ginger savely discusses the issue of delusional parasitosis.
your girlfriend just needs a mini microscope to determine if she has morgellons or not.
how do you think she feels to be told that? Only a broken system would do that.