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The stool guaiac test or guaiac fecal occult blood test (gFOBT) is one of several methods that detects the presence of fecal occult blood [1] (blood invisible in the feces). [2] The test involves placing a fecal sample on guaiac paper (containing a phenolic compound, alpha-guaiaconic acid, extracted from the wood resin of Guaiacum trees) and ...
The sensitivity of a single-stool guaiac test to pick up bleeding has been quoted at 10 to 30%, but if a standard three tests are done as recommended the sensitivity rises to 92%. [57] Reduced patient compliance with the collection of three samples hampers the usefulness of this test.
Yellow and blue tops for parasite testing, red top for stool cultures and the white top was provided by the patient with the sample. A stool test is a medical diagnostic technique that involves the collection and analysis of fecal matter. Microbial analysis (culturing), microscopy and chemical tests are among the tests performed on stool samples.
Slide tests are based on orthotolidine (Hematest reagent tablets and Bili-Labstix) or guaiac (Hemoccult and Gastroccult). There is some evidence that orthotolidine-based tests more sensitive than specific, the Hemoccult test's sensitivity reduced by the acidic environment; and the Gastroccult test be the most accurate. [11]
Veterinary medicine. In veterinary medicine rectal examination is useful in dogs for analysis of the prostate (as in men), pelvic urethra, sublumbar lymph nodes, and anal glands. In horses it is a vital component of the clinical examination for colic, to determine the presence or absence of bowel torsion, impaction, or displacement.
It is similar in specificity and sensitivity to the stool guaiac test or fecal immune tests, and those tests should be used in preference. [13] In cases when the physician aggressively has recommended a colonoscopy and the patient has declined that and these other tests, then this test has advantages over patients having no screening at all. [13]
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