Occult blood in stool is impossible to see with the naked eye and requires a fecal occult test that detects hidden blood in feces sample, according to WebMD. Sometimes people can see blood in their stool, however. More »

Occult blood in a urinalysis may signal a urinary infection, kidney or bladder stones, kidney trauma or a prostate infection, according to the Urology Care Foundation. Blood in urine could also result from a tough workou... More »

Fecal occult blood is small amounts of blood hidden in the feces, notes Mayo Clinic. Tests for fecal blood are done to see if there is blood loss in the gastrointestinal tract, which stretches from the mouth to the colon... More »

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Fecal occult blood test results determine whether or not a patient has a problem in his digestive system, such as a polyp, growth or cancer in the rectum or colon, according to WebMD. The doctor carries out a fecal occul... More »

A rheumatoid arthritis blood test may determine the concentration of rheumatoid factors that a patient has in his blood, as stated by WebMD. One common blood test for rheumatoid arthritis is the rheumatoid factor test. More »

Clostridium difficile is very contagious because the spores, which are found in the feces, are capable of living on dry surfaces for an extended time, according to WebMD. Another person can become infected with Clostridi... More »

To use a colon test kit, follow any dietary restrictions for three days before beginning the test, collect a stool sample using an enclosed collection stick, and apply it to the test card, according to the American Cance... More »