Addition of Lactobacillus to Metronidazole in Treatment of CDAD

Inclusion Criteria: * Subjects will be identified based on the diagnosis of CDAD. This diagnosis is made bases on the presence of diarrhea, fever, abdominal pain and/or leukocytosis together with a positive fecal assay for Clostridium difficile toxin Exclusion Criteria: * Patients who are unable to take oral medications and those with underlying gastrointestinal disease or colonostomy will be excluded. * Patients currently taking penicillins, cephalosporins, quinolones or tetracyclines will be excluded because these drugs are active against Lactobacillus.