Quick Shot #14 Answer

Answer: Fecal microbiota transplant or Bezlotoxumab or Fidaxomicin or 
Switch ustekinumab to a JAK inhibitor after treatment of C. difficile
or Referral to surgery to discuss colectomy

This patient is on her 3rd episode of C. difficile infection. For this recurrence, a preferred antibiotic strategy would be fidaxomicin (which she has never been treated with before) along with bezlotoxumab, a monoclonal antibody to C. difficile toxin B, which has been associated with reduction in risk of recurrent C. difficile. Fecal microbiota transplant should be considered even in the presence of active IBD, as efficacy for treatment of C. difficile remains high . A repeat course of vancomycin with taper along with bezlotoxumab could be considered if fidaxomicin is not available but would not a preferred option. The patient is not hospitalized with fulminant C. difficile infection and therefore combination therapy with metronidazole and vancomycin is not indicated. Additionally, her UC has been poorly controlled, with primary non-response to infliximab, and only partial response to ustekinumab, as demonstrated by persistent steroid dependence. Consideration can be given to switching to either tofacitinib or upadacitinib if she continues to have active UC after treatment of C. difficile, but referral to colorectal surgery should also be made as she may require colectomy to control her disease. Switching to adalimumab is not likely to benefit her with primary non-response to another anti-TNF.