I have never been told that I will always test positive either in fact done couple tests after and both came back negative. May I ask for how long we should be on probiotic after CDiff? Anyone out there that continued with probiotic and for how long?? And what is the strain? @cece55 you could ask your doctor to repeat the test when you are off the antibiotic if you are still not well. Hope you don’t relapse. I took as well both the Boulardii and probiotic for good 3 month and stopped the Boulardii and now still on probiotic. But not sure when should I stop?