A research team led by Professor Nai-Chen Cheng from National Taiwan University Hospital, in collaboration with Professor Chao-Min Cheng from the Department of Biomedical Engineering at National Tsing Hua University, has successfully developed a "Wound Biofilm Infection Detection Kit" that can accurately determine in just two minutes whether a wound is infected with a bacterial biofilm and assess the extent of the infection, providing clinicians with a rapid and precise diagnostic tool.
Biofilms Impede Wound Healing: Traditional Methods Have Limitations
A biofilm is a structure formed by bacteria and the polymer matrix they secrete. When it forms on the surface of a wound, it obstructs the penetration of antibiotics and immune cells, leading to persistent infection and delayed healing. While traditional detection methods such as electron microscopy and tissue biopsy are precise, they are expensive and invasive, making them difficult to implement widely. Furthermore, microbial cultures cannot directly distinguish whether bacteria are forming biofilms, and molecular biology tests may produce false positives due to dead bacterial gene fragments. These limitations make it challenging for clinicians to quickly assess the infection status, affecting treatment decisions and the patient's recovery process.
Low-Cost, Highly Sensitive: Two-Minute Accurate Detection of Biofilm Infection
The new wound biofilm infection detection kit utilizes a unique imprinting technique with special staining methods to quickly and accurately detect the distribution and severity of biofilms on the surface of wounds. Using the imprinting technique, the process only requires gently pressing a specially designed test strip onto the wound to collect biofilm from the surface without needing tissue samples. Subsequent analysis uses specific dyes that selectively bind to the polysaccharide structures in the biofilm matrix, causing the biofilm molecules adhering to the test strip to change color under light, allowing for visual interpretation.
The test kit produces results in just two minutes, overcoming the limitations of traditional methods that require invasive sampling or long waiting times for test reports, enabling more precise, timely, and cost-effective clinical diagnosis. The cost is only 10% of that of electron microscopy and 60-70% lower than microbial cultures, significantly reducing the financial burden on healthcare. Clinical data shows that the kit has a sensitivity of 90% and specificity of 85%, accurately identifying patients who require anti-biofilm treatment. Additionally, the kit is suitable for various types of wounds, including concave or irregular tissue areas, ensuring stable results and enhancing the accuracy of clinical diagnosis and treatment effectiveness.
Promoting Standardized Care and Expanding to Primary Care
Professor Nai-Chen Cheng emphasized that this detection kit not only addresses the long-standing lack of biofilm detection tools for clinicians but also establishes a standardized process for diagnosing and treating wound biofilm infections, improving wound care quality. The team plans to collaborate with major medical centers during the initial promotion phase to develop guidelines for treating biofilm-infected wounds and gradually integrate the technology into the national healthcare system. In the future, this technology could be applied in primary healthcare settings and long-term care institutions, and even allow individuals to conduct self-tests at home, achieving early detection and early treatment goals.
Resource: 試片輕壓傷口檢測生物膜 2分鐘掌握細菌感染
