Related Experiment Video
Updated: Mar 29, 2026
Rapid Detection of Fecal Antigen of Helicobacter pylori Infection Based on Double Antibody Sandwich Detection Technology
Published on: May 23, 2025
[Development of an Immunochromatographic Test System for the Detection of Helicobacter pylori Antigens]
Insights
A rapid immunochromatographic test for Helicobacter pylori antigens was developed. This express assay achieves a low detection limit for H. pylori antigens, enabling field diagnostics.
Area of Science:
- Immunotechnology
- Biochemical diagnostics
- Microbiology
Background:
- Helicobacter pylori (H. pylori) infection is a significant global health concern.
- Accurate and rapid diagnostic methods are crucial for timely treatment and management.
- Existing diagnostic techniques may lack speed or field applicability.
Purpose of the Study:
- To develop an express diagnostic test system for H. pylori antigens.
- To optimize the test system for high sensitivity and minimal detection limits.
- To evaluate the test system's performance in various sample types for potential field use.
Main Methods:
- Development of a sandwich immunochromatographic assay.
- Utilized gold nanoparticles for staining and silver enhancement for sensitivity.
- Characterization of concentration and kinetic dependences of immunochemical interactions.
Main Results:
- Successfully developed an express test for H. pylori antigens with a 10-minute assay duration.
- Achieved a detection limit of 0.3 μg/mL for H. pylori cell wall antigens in aqueous solution and fecal samples.
- Silver enhancement reduced the detection limit to 0.03 μg/mL, demonstrating enhanced sensitivity.
Conclusions:
- The developed immunochromatographic test system provides a sensitive and rapid method for H. pylori antigen detection.
- The test system's performance, including low detection limits and short assay time, supports its use in field diagnostics.
- This technology offers a valuable tool for point-of-care testing and epidemiological surveillance of H. pylori.
Abstract:
A test system based on immunochromatography in the sandwich format and intended for express detection of Helicobacter pylori antigens has been developed. Contact of a sample with a test strip coated with immunochemical reagents triggers the movement of the liquid along the membrane components of the test strip, immunochemical interactions, and the formation of detection zones stained by gold nanoparticles. The concentration and kinetic dependences of the immunochemical interactions have been characterized. The reagent and membrane composition of the test system has been selected to provide a minimal detection limit. The detection of H. pylori cell wall antigens at concentrations as low as 0.3 μg/mL in aqueous solution and a suspension of a clinical sample of feces has been demonstrated; the assay duration was 10 minutes. Staining enhancement by the addition of silver salts allowed for a further reduction of the detection limit to 0.03 μg/mL. The developed test system can be used for field diagnostics.
Related Concept Videos
01:16Treating Helicobacter pylori in Peptic Ulcers: Antimicrobial Therapy
01:28Peptic Ulcer Disease III: Clinical Manifestations and Diagnostic Studies
Few clinical manifestations differentiate gastric ulcers from duodenal ulcers. Distinctions in the location, timing, and pain relief are crucial for healthcare providers in differentiating between gastric and duodenal ulcers during clinical assessments.