This document discusses, among other things, receiving a plurality of donor fecal samples from a plurality of donors and storing and indexing each respective donor fecal samples using at least one characteristic of the respective donor fecal sample. In an example, the donor fecal sample can be screened and processed for subsequent use in fecal bacteriotherapy to displace pathogenic or undesired organisms in the digestive track of a patient with healthy or desirable gut microbiota.
