Colorectal cancer is the third most common cancer in the world. About one million patients are diagnosed with colorectal cancer each year, and more than half a million die from this disease. Detection methods for diagnosis of colorectal cancer: human fecal occult blood reaction test (FOB), large intestine double illumination test, large intestine endoscopy, etc. The clinical trial results obtained through the comprehensive detection of human fecal occult blood reaction can reduce the mortality caused by colorectal cancer. The traditional method for detecting fecal occult blood is the chemical method, is the hemoglobin in the peroxidase activity sensitive guaiac wood fat stool fob rapid test
(Guaiac-FOB test). However, guaiac-fob test is non-specific to human hemoglobin and has low sensitivity to the clinical significance of colorectal cancer. In order to solve this problem, the method fob rapid test which adopts monoclonal antibody with specific reaction to human hemoglobin is used.
When the digestive tract hemorrhages, the red blood cells in the blood are digested, decomposed and destroyed, and the feces contain bleeding that cannot be proved by the naked eye and microscope, which is called fecal occult blood. There are many diseases such as colorectal cancer, colitis, peptic ulcer disease early without symptoms, which only have fecal occult blood. Biochemtron fob rapid test adopts high specificity antibody antigen reaction and immunochromatography and test human hemoglobin in feces in double antibody sandwich method. The test results are got in 5 minutes. It has very high accuracy in detecting lower gastrointestinal bleeding.