@oristarA,
I think it's more of an issue with which antibiotic is chosen first. In my daughter's case she was over-prescribed a "big gun" broad spectrum antibiotic for a routine UTI. It wiped out everything except the C-diff which then proliferated and caused a secondary infection (this time in her colon). She never should have been prescribed the Cipero -- it's not even indicated as first line treatment of UTIs, only "complicated UTIs" and hers certainly wasn't complicated. Of course, we only learned all this while sitting in the ER with her so she could get some IV solutions pumped in to counteract the dehydration associated with the C-diff infection.
The whole thing completely affected the normal workings of her gut. She was then prescribed one of the two antibiotics mentioned in the article along with a probiotic to try to reinstate normal flora. That was in early July. I don't think she's going to be one of the 20% that has to deal with chronic reinfection (a lifelong problem for many C-diff sufferers, particularly the elderly) because she is young and generally healthy, but she's still not back to her old self. She's dropped about 15lbs (10 of which she'd gained the year before as a college freshman) but she was already thin. She's 5'11" tall, weighs 137 lbs, and has no appetite whatsoever.