title: Enzyme immunoassay for occult faecal blood.
abstract: The specificity and sensitivity of immuno-assays can be usefully exploited for early detection of digestive bleeding disorders. We have developed an enzyme immuno-assay (EIA) specific of human haemoglobin (Hb-Hu) by which occult faecal blood can be detected without any need for dietary restrictions or for repetitive sampling, as would be required with other procedures. This EIA can detect Hb-Hu by a sensitivity of 2.5 ng/ml of faecal extract as well as dissociated alpha and beta chains and peptic or tryptic proteolytic Hb-Hu fragments. The EIA, when applied to occult faecal bleeding in patients with malignant tumours in the digestive system, was positive on some 80 percent of all samples.
authors.forename: C
authors.initials: C
authors.lastname: Cervantes
authors.forename: H
authors.initials: H
authors.lastname: Vega
authors.forename: L
authors.initials: L
authors.lastname: Pérez
authors.forename: R
authors.initials: R
authors.lastname: Feliú
mesh_terms: D015179:Colorectal Neoplasms / Q000175:diagnosis*; D004797:Enzyme-Linked Immunosorbent Assay; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D009780:Occult Blood; D011237:Predictive Value of Tests
chemical_list: D006454:Hemoglobins