“…These studies tested 1 of 4 different types of probiotics: L. casei Shirota (''Yakult'' Yakult Honsha, Tokyo, Japan), 25 or L. plantarum 299v (''SanProbi AB,'' Probi AB, Lund, Sweden), 26 or a symbiotic S. boulardii DBVPG6763 and MOS (''Sacchaflor,'' PharmaForce, Copenhagen, Denmark), 27 or a 3-strain mixture of Lactobacilli composed of L. acidophilus CL1285, L. casei LBC80R, and L. rhamnosus CLR2 (''Bio-K+,'' Bio-K Plus International, Inc., Qusebec, Canada). [28][29][30] In addition, we found 12 other studies in the literature relating to the above mentioned intervention studies. Three studies provided follow-up data on CDI rates when probiotic interventions were continued for 6-10 years 31,32 or 15 years 33 ; one other study reported CDI rates 1 year after a probiotic intervention was discontinued, 34 3 studies assessed cost savings of a probiotic intervention, 16,35,36 4 other studies were reviews or commentaries on these earlier probiotic intervention studies [37][38][39][40] and 1 study retrospectively added an extended baseline period.…”