# Hidden DNA copying may accelerate bacterial antibiotic resistance New research reveals a previously unknown mechanism of bacterial adaptation. - **Source:** [Phys.org - latest science and technology news stories](https://brifing.si/source/8b0f98da-d179-4c93-871f-7ac460bf9c61) - **Published:** 2026-07-27 - **Original article:** - **On Brifing:** https://brifing.si/s/f43231db-e6e8-4fec-bd2a-765e52f483e4 ## Antibiotic resistance becomes a global threat Over the past two decades, antibiotic resistance has been listed by WHO as one of the top 10 global health threats. An estimated 1.2 million deaths in 2019 were directly attributed to drug-resistant infections. Experts warn that losing antibiotic effectiveness could make even simple infections deadly. The economic cost of this crisis may exceed $100 trillion by 2050. Overuse in hospitals and agriculture is accelerating this problem at an alarming rate, requiring immediate international attention and coordinated action. ## Bacterial strategies for developing resistance Bacteria employ various genetic mechanisms to develop antibiotic resistance, with mutation accumulation and horizontal gene transfer being most common. However, new research points to a lesser-known process called 'hidden DNA copying.' In this mechanism, bacteria can actively replicate genes that confer antibiotic resistance. This process enables much faster adaptation compared to traditional methods, potentially explaining the rapid emergence of superbugs in clinical settings and the environment. ## Discovery of the DNA copying mechanism A study published in Nature Microbiology revealed a previously unknown DNA replication process in E. coli bacteria. Researchers found that under stress (such as antibiotic exposure), bacteria selectively amplify specific DNA regions. Unlike normal replication, this process allows resistance genes to be copied up to 50 times more. Laboratory experiments demonstrated that this mechanism enables bacteria to develop high resistance in less than 24 hours, challenging existing evolutionary models of microbial adaptation. ## Findings that challenge classical resistance theories Traditional evolutionary theories suggested antibiotic resistance develops gradually through random mutation accumulation. This new mechanism shows bacteria can respond immediately to environmental threats. Harvard Medical School researchers note this discovery could fundamentally change our understanding of microbial adaptation. Particularly striking is the finding that bacteria can 'sense' antibiotic presence and produce specific genetic responses, indicating a sophisticated level of environmental awareness in microorganisms. ## Implications for clinical practice This discovery may explain why hospital-acquired infections develop drug resistance so rapidly. Superbugs like MRSA likely utilize this mechanism. Clinical microbiologists emphasize these findings will shape next-generation antibiotic development strategies. Specifically, drugs targeting the DNA copying process may be used in combination therapies. This approach could extend the lifespan of existing antibiotics, buying crucial time until novel antimicrobials become available. ## Warning bells for the agriculture sector Routine antibiotic use in industrial livestock farming significantly contributes to resistant bacteria spread. The new research shows farm animal bacteria may use this hidden copying mechanism to rapidly develop resistance. According to a 2022 FAO report, up to 80% of veterinary antibiotics in some countries are used as growth promoters. Experts call for urgent review of these practices and implementation of stricter regulations to prevent agricultural practices from undermining human medicine. ## Potential revolution in diagnostic methods Current antibiotic susceptibility tests cannot fully measure bacterial resistance potential. This discovery could lead to diagnostic tools evaluating pathogens' DNA copying capability. Researchers at Massachusetts General Hospital are developing rapid test kits that might enter clinical use within 3-5 years. These technologies would show physicians how quickly a patient's bacteria could develop resistance, enabling truly personalized antibiotic selection and stewardship. ## Call for global collaboration The 2023 World Health Assembly described antibiotic resistance as a 'silent pandemic.' Experts stress these new findings necessitate updating urgent action plans. Key recommendations include: 1) Additional $2 billion annual funding for new antibiotic R&D, 2) 50% reduction in agricultural antibiotic use, 3) Expansion of advanced surveillance systems globally. Addressing this crisis requires integration of scientific, economic and political solutions through unprecedented international cooperation. ## Sources covering this story - https://phys.org/news/2026-07-hidden-dna-bacteria-faster-route.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._