The detection of fecal occult blood is important for the diagnosis of disease that results in gastrointestinal bleeding and to screen for colorectal cancers and large adenomas that bleed. Screening for colorectal cancer probably increases the cancer detection at an early stage, therefore reduces the mortality.

One Step Fecal Occult Blood (FOB) Test is a lateral flow immunoassay for the qualitative detection of human hemoglobin in fecal samples.