Related Experiment Videos
An immunofluorescent test for faecal occult blood
Lancet (London, England)
|January 3, 1981
Summary
This study introduces an improved immunological test for detecting faecal occult blood, offering higher accuracy and reduced errors for screening purposes. The new method utilizes fluorescein-labelled antibodies for precise haemoglobin quantification in stool samples.
Area of Science:
- Immunology
- Biochemistry
- Medical Diagnostics
Background:
- Faecal occult blood testing is crucial for early detection of gastrointestinal diseases.
- Existing chemical tests for faecal occult blood have limitations, including cross-reactivity and observer variability.
Purpose of the Study:
- To develop and describe a novel immunological test for faecal occult blood detection.
- To evaluate the suitability of this test for large-scale screening programs.
Main Methods:
- An immunological assay using fluorescein-labelled rabbit anti-human-haemoglobin serum was employed.
- The assay involves binding free antibody to a membrane sampler coated with human haemoglobin.
- Fluorescence measurement using a fluorometer quantifies haemoglobin levels in faecal suspensions.
Main Results:
- The immunological test demonstrated accurate estimation of haemoglobin levels in faecal samples.
- The method showed no cross-reaction with animal haemoglobins, a significant advantage over chemical tests.
- Minimal observer error and adjustable sensitivity were key benefits observed.
Conclusions:
- The described immunological test is a reliable and sensitive method for faecal occult blood screening.
- This assay offers improved specificity and reduced variability compared to traditional chemical methods.
- The test's characteristics make it highly suitable for widespread clinical application in screening programs.