This bacterium is normally present in the colon, but when antibiotics kill some other normal bacteria, C-diff overgrow and
causes diarrhea. This is potentially dangerous disease, you MUST have a stool
test for C-diff and if positive, treat it immediately, well - with other antibiotics, as prescribed.
Burping may be the symptom in another problem - H. pylori infection of your stomach, which may be confirmed by a breath test.