Abstract
Cancer continues to be a significant global health issue with one in six deaths linked to the disease despite advancements in cancer detection and treatment. Recently, Helicobacter pylori (H. pylori) was identified as a risk factor for cancer development. This gram-negative bacterium is associated with gastric conditions, including stomach cancer. Although the exact transmission methods of this bacterium are still unclear, studies suggest that waterborne transmission is possible. This study focuses on the development of a colorimetric nanomaterial-based paper biosensor for specific H. pylori detection using H. pylori extracellular proteases as biomarkers. The biosensor utilizes a unique substrate labeled with magnetic nanobeads and bound to a gold sensing platform. The biosensor's limit of detection (LOD) of 100 CFU/mL, selectivity, stability, and ability to detect H. pylori in clinical specimens were evaluated, demonstrating promising results in terms of sensitivity and specificity. In comparison to traditional methods, this biosensor offers advantages in simplicity and ease of use, making it appropriate for on-site detection in both environmental and clinical settings.
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