Posted 2/22/2015 4:26 AM (GMT 0)
If it's viral, it shouldn't last long. Usually 12 to 24 hours, but sometimes maybe up to 3 or 4 days.
If it's bacterial, yes, you would likely need antibiotics. But first it would need to be confirmed with stool cultures. In fact, many IBD doctors do stool cultures any time a patient shows signs of a new flareup, because sometimes what they think is a Crohn's flare is actually an infection. The infection c. diff should also be tested for. I would not take antibiotics without testing and confirmation that it is indeed a bacterial infection.