my 98 y/o aunt is in nursing home/rehab and has had severe diarrhea ,no appetite and vomiting...this followed a lot of antibiotics she had for double pneumonia. She is positive for C Diff and has had flagyl,proantibiotics and now vancomycin.this has been going on for 3 weeks...she gets better then a few days later she starts again with the same symptons..They collected another stool sample today. also we had her in er 2 weeks ago and she had a severe UTI She is miserable and deteriorating,,,,, any suggestions