How do you approach management of patients with active RA and recurrent non-severe C.diff?

I think the question here is why the patient is experiencing recurrent C.diff. Is it true recurrence or it never fully clears? Any IgA deficiency? CVID?

I would do an immune deficiency work up- complements, immunoglobulines and flowcytometry, response to pneumococcal vaccine.

In parallel to the wo...