New research from Monash University, published in Nature Communications, reveals that the bacterium Clostridioides difficile has picked up a key gene that gives its dormant spores a free pass against antibiotics and cleaning products. Antibiotic resistance is supercharging dangerous gut bacteria to withstand even hospital-grade disinfectants intended to kill them. Its spores act like plant seeds, waiting to activate and spread in the right environment, like the human gut. This is particularly dangerous because the bacterium is commonly found in hospitals and causes diarrhea that can be deadly for patients who are already ill.
A Microbial Threat in Hospital Corridors
Lead researcher Dena Lyras, interim dean of the Monash Sub-Faculty of Biomedical and Psychological Sciences and director of Monash Biomedicine Discovery Institute, said the research is a crucial step forward in the race against antimicrobial resistance.
A Global Health Crisis Escalates
Antimicrobial resistance occurs when bacteria stop responding to antibiotics, leading to infections that can be hard or impossible to treat. The World Health Organization lists this phenomenon as a major global health threat and estimates that it contributes to millions of deaths every year.
Unlocking the Mechanism of Tougher Spores
The research, the first to uncover a link between antibiotic resistance and bacterial spores, shows that when Clostridioides difficile picks up this antibiotic resistance gene, the antibiotic block no longer works. Instead, the bacterium can make even tougher spores that can survive hospital-grade cleaning products and high laundry temperatures. The antibiotic resistance gene produces a protein that replaces a key spore-building protein, allowing the bacterium to keep making spores.
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