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Antibiotic treatment disturbs the normal gastrointestinal flora and raises risk for Clostridium difficile–associated diarrhea (CDAD). To evaluate the effectiveness and safety of probiotics for preventing CDAD, researchers performed a systematic review and meta-analysis. CDAD was defined as an episode of diarrhea associated with a positive C. difficile culture or toxin assay.
Twenty randomized, controlled trials that involved 3818 adults and children were included in the analysis; 18 studies were placebo controlled. Information on antibiotic regimens was not provided. Probiotics used in the trials included Bifidobacterium, Lactobacillus, Saccharomyces, and Streptococcus species.
Probiotics lowered the incidence of CDAD by approximately 66%. Th…