FOB Test Cassette (Colloidal Gold) is a rapid chromatographic immunoassay designed for the qualitative detection of human occult blood in feces. It is used in professional laboratories or physician's offices to detect bleeding caused by gastrointestinal disorders like diverticulitis, colitis, polyps, and colorectal cancer. The test is recommended for routine physical examinations, hospital monitoring for bleeding, and screening for colorectal cancer or gastrointestinal bleeding from any source. The test uses a double antibody-sandwich technique where the specimen reacts with colloidal gold coated with anti-hemoglobin antibodies, migrating on the membrane to generate a colored line indicating a positive result