What's causing chronic diarrhoea with recurrent sepsis & utis for 5 months which started 5 days afterroutine cystoscopy with colistin antibiotic cover?

antibiotics: Most diarrhea is due to antibiotics killing off your regular gut bacteria and causing diarrhea. Sometimes you can get a super infection (c diff) due to antibiotics. Try some yogurt to give back some bacteria to your gut. If this doesn't work you should see your doctor.

PMC: The use of antibiotics predisposes someone to have c diff infection even a few weeks after. Since it has become chronic now, worry about interruption also of gut integrity and translocation of bacteria. Have a good exam done, perhaps, by GI and id. The recurrent UTI can be discussed with the person who did the cystoscopy and id to see if there is a predisposing factor.