Hemosure's fecal occult blood test is a qualitative, sandwich dye conjugate immunoassay and employs a combination of monoclonal and polyclonal antibodies to selectively identify in human feces, as an aid in diagnosis of fecal occult blood, with a high degree of sensitivity.. In less than 5 minutes, elevated levels of human hemoglobin as low as 0.05 ugHb/ml can be detected and positive results for high levels of hemoglobin can be seen in the test as early as 1 or 2 minutes.. Test kit contains 30 fecal occult blood test cassettes and 30 collection tubes..