Clinical Research Directory

Inclusion Criteria: * Diagnosis of a malignant neoplasm at the at Children's Hospital Colorado or the University of Colorado Hospital * Diagnosis of first time or first recurrent CDI as defined by clinical criteria within the past 21 days * Informed consent obtained and signed. For minors, the consent will be completed by a guardian and the study participant will sign the assent form. Only the consent form is required of adults. * 9 years old or older * 40th to 100th percentiles of saturated fat intake and below the 50th percentile for fiber intake based on a food frequency questionnaire. * Ability to comply with study procedures for the entire length of the study.