Rapid Detection of Helicobacter pylori Virulence and Typing Using Quantum Dot Labeling Technology.

We present a method based on quantum dot labeling technology for rapidly detecting the virulence of Helicobacter pylori and performing typing, aiming to overcome the limitations of conventional diagnostic methods and provide a basis for personalized clinical treatment. A kit was designed using the double-antigen sandwich method. This involved a series of meticulous steps, including establishing buffer reaction systems and conducting activation and coupling processes for antigen-antibody reactions during kit preparation. Additionally, there were specific procedures for sample collection, processing, and testing operations to determine the infection status and virulence type of Helicobacter pylori. By establishing data models for different results (negative, type II, and type I), the effectiveness of the quantum dot technology in typing detection was verified. In the case of negative samples, there were weak or no significant signal values in relevant detection areas. For type II samples, a specific pattern of positive and negative signal values for different antibodies was observed, and for type I samples, a distinct set of positive signal values corresponding to key antibodies was noted. Moreover, its application in studies related to chronic gastritis and gastric cancer demonstrated its value in serving as a screening indicator. The quantum dot-based method has advantages like improved sensitivity and specificity compared to traditional diagnostic methods. However, it also faces challenges such as potential impacts from sample storage time and relatively high costs. Nevertheless, with continuous technological innovations, it is expected to play a more significant role in the biomedical field for Helicobacter pylori detection and related disease diagnosis in the future.