# Living Medicine Targets Drug-Resistant Biofilms in Hospital Ventilation Genetically modified bacteria successfully reduce antibiotic-resistant Pseudomonas aeruginosa biofilms in porcine lung models. - **Source:** [Medical Xpress](https://medicalxpress.com) - **Published:** 2026-11-11 - **Topic:** [health](https://brifing.si/c/health) - **Original article:** - **On Brifing:** https://brifing.si/s/0f3bebed-ae0d-48a0-81c1-146f28ed265c ## Innovative Living Medicine Approach Researchers have developed a novel living medicine designed to combat persistent bacterial infections. This experimental treatment utilizes genetically modified bacteria to target drug-resistant Pseudomonas aeruginosa. These pathogens frequently form biofilms on the surfaces of endotracheal tubes, which are critical medical devices used for hospital ventilation in intensive care units. ## Targeting Persistent Biofilm Layers Biofilms act as protective shields for bacteria, making them notoriously difficult to eradicate with standard antibiotics. The study specifically focuses on the layers of Pseudomonas aeruginosa that colonize medical equipment. By deploying a living agent, the therapy aims to physically thin these resilient structures, potentially reducing the risk of pneumonia. ## Successful Porcine Lung Trials The effectiveness of this living medicine was demonstrated in a study involving pigs, as detailed in the journal eBioMedicine. Researchers observed a significant thinning of the bacterial biofilms within the lungs of the test subjects. This successful application in a biological model provides a foundation for further clinical investigation and development. ## Inhalation Delivery Mechanism The treatment is administered via inhalation, allowing the modified bacteria to reach the site of infection directly. This delivery method is crucial for targeting the endotracheal tubes where biofilms accumulate. By focusing the therapeutic agent precisely where the bacteria reside, the approach minimizes systemic exposure while maximizing local antimicrobial activity. ## Addressing Antibiotic Resistance Crisis Antibiotic resistance remains a major challenge in modern healthcare, rendering conventional treatments ineffective against certain hospital-acquired infections. Pseudomonas aeruginosa is a primary concern due to its ability to survive harsh environments and resist multiple drug classes. This living medicine offers an alternative strategy to bypass traditional chemical antibiotic limitations. ## Clinical Implications for Hospitals Hospital-acquired infections related to ventilation tubes contribute to increased morbidity and longer hospital stays for critically ill patients. If this living medicine proves safe and effective in human trials, it could fundamentally change how clinicians manage device-associated infections. Reducing biofilm buildup directly on the tubes could improve overall patient outcomes. ## Mechanism of Bacterial Modification The bacteria used in this treatment were genetically engineered to specifically recognize and interact with the target pathogen. This precision engineering ensures that the living medicine focuses its activity on the harmful biofilms. Such specificity is a hallmark of synthetic biology applications in medicine, aiming to reduce collateral damage to patients. ## Future Research and Development While the results in porcine models are promising, further research is required to ensure safety and efficacy in human subjects. Scientists must evaluate the long-term stability of the modified bacteria and potential immune responses. This study represents an early but significant step toward integrating living therapies into standard clinical practice. ## Sources covering this story - https://medicalxpress.com/news/2026-11-medicine-tackles-drug-resistant-biofilms.html — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._