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Rectal culture
Definition Rectal culture is a laboratory test to identify organisms in the rectum that can cause gastrointestinal symptoms and disease. Alternative Names Culture - rectal How the test is performed A cotton swab is inserted into the rectum, rotated gently, and removed. A smear of the swab is placed in culture media to encourage the growth of bacteria and other organisms. The laboratory technician watches the culture for growth. When growth is observed, the organisms can be identified. Further tests to determine how the organisms will respond to treatment may also be done. See also: Sensitivity analysis How to prepare for the test The health care provider does the rectal examination. How the test will feel There may be pressure as the swab is inserted into the rectum, but the test is usually not painful. Why the test is performed The test is performed if you have gastrointestinal distress and your doctor suspects that an infection is the cause. It may be done when gonorrhea is suspected. It may also be done as an alternative to a fecal culture if it is not possible to get a feces specimen. The rectal culture may also be performed in a hospital or nursing home setting to see if someone carries vancomycin-resistant enterococcus (VRE) in their intestine, which can be spread to other patients. Normal Values The presence of organisms that are usually found in the body is normal. What abnormal results mean Abnormal results may indicate an infection, such as bacterial or parasitic enterocolitis or gonorrhea. Sometimes culture shows that the patient is a carrier, but does not necessarily have an infection. See also: Proctitis What the risks are There are no risks. Review date: 11/12/2007 Reviewed By: Arnold L. Lentnek, M.D., Division of Infectious Disease, Kennestone Hospital, Marietta, GA. Review provided by VeriMed Healthcare Network.
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