Feces are a “bodily fluid” and proper donor screening and testing is essential. Donors complete a screening questionnaire similar to that which is done at blood banks and for organ or tissue transplants. Prospective donors with risk factors for HIV and viral hepatitis are excluded from donating. Persons with significant gastrointestinal or autoimmune disease or a history of malignancy are not acceptable donors. Donors who meet donor criteria undergo blood work testing for HIV, Hepatitis A, B and C, and syphilis. They are also asked to submit stool to be tested for parasites and C difficile. Donors are cautioned that their health insurance may not cover the costs of these screening tests which may amount to several hundred dollars.