Does ulcerative colitis respond to antibiotics?

Hi everyone,

I'm new to the forum here, and new to having any bowel / gastro related issues. As of the last week I started experiencing abdominal symptoms, including urgent and frequent blood diarrhea and fairly severe abdominal cramping. Initially I went to the doctor who believed it was a bad gastro virus and after a visit to a&e I was left with the same answer. Unsatisfied, I got a second opinion from another GP who said my blood tests showed increased inflammatory markers and put me on a dose of antibiotics for bacterial gastroenteritis. I responded immediately very well to the antibiotics, and have been feeling better each day since. However, I also sent in a stool sample which came back (twice for two different samples) as clear of any bacteria, leaving me confused.

I was wondering if anyone else had ever been in another position and what the outcome was? I'm just confused as to why I'd be responding clinically well to antibiotics if it isn't an infection.

I'm a very anxious person and generally think the worse case scenario, so any help would be appreciated.

Thanks!

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