Posted 7/10/2009 11:59 PM (GMT -6)
Yes, false negatives are totally par for the course. The test is so unreliable that they made me do 4 tests before that would release me from the hospital. My GI basically doesn't even bother testing me for the recurrances half the time now when I get sick because I can tell from my symptoms more reliably than from any test.
I don't know anthing about xifaxan, but certain anti-biotics do have the potential to make c.diff, so I would be wary of it, especially due to the note in the packet. And fever, pain, diarhhea, and abnormal BM smell would all be getting worse if it is c.diff.
What does your doctor think is going on that needs to be treated with xifixan? Since flagyl is used fairly frequently in Crohn's anyway AND can treat c. diff, can't you try a course of that?
If your condition continues to deteriorate, and your doctor is no help, I would recommend going to the ER. If you have c diff they'll put you on IV flagyl and vancomycin and it will wipe it out pretty quick.