Lactulose/mannitol test: an ideal screen for celiac disease.

Area of Science:

• Gastroenterology
• Clinical Diagnostics
• Biochemistry

Background:

• Celiac disease diagnosis often relies on invasive procedures.
• Non-invasive screening tests are valuable for early detection.
• The cellobiose/mannitol (Ce/Ma) test is a standard for assessing intestinal permeability.

Purpose of the Study:

• To evaluate the lactulose/mannitol (La/Ma) test as a potential screening tool for celiac disease.
• To compare the diagnostic performance of the La/Ma test with the established Ce/Ma test.
• To assess the sensitivity, specificity, and predictive values of the La/Ma test in a clinical setting.

Main Methods:

• A comparative study involving patients with newly diagnosed celiac disease and healthy controls.
• Administration of both La/Ma and Ce/Ma tests to participants.
• Analysis of urinary sugar excretion ratios to determine intestinal permeability.
• Evaluation of La/Ma test performance in a larger cohort referred to a gastroenterology clinic.

Main Results:

• The La/Ma test demonstrated comparable diagnostic accuracy to the Ce/Ma test in distinguishing celiac disease patients from controls.
• In a selected group, the La/Ma test exhibited high sensitivity (89%) and a high negative predictive value (95%).
• The La/Ma test is sensitive, low-cost, simple to perform, and avoids diarrhea in patients with hypolactasia.

Conclusions:

• The lactulose/mannitol (La/Ma) test is a viable and effective non-invasive screening method for celiac disease.
• Its high sensitivity and NPV make it suitable for widespread screening in at-risk populations.
• The La/Ma test offers advantages over existing methods, including ease of use and patient tolerance.