German China
On the left, a Vibrio cholerae strain that produces the antimicrobial Mvcc (center) outcompetes a surrounding V. cholerae strain that does not produce an antidote to the antimicrobial. This creates a zone of exclusion between the two strains (dark ring). On the right, neither strain produces an antimicrobial and so neither has a competitive advantage.  (Source: Bryan Davies/University of Texas at Austin)
Health

Discovery of New Antimicrobial Could Help Treat Cholera

Researchers see promise in a class of natural antimicrobials called microcins, which are produced by bacteria in the gut and help them compete with rival bacteria. The researchers also identify the first known microcin that targets the strains of bacteria that cause cholera and describe a method for finding microcins in bacterial genomes with the help of artificial intelligence.

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Scanning Electron Microscopy image of C. difficile in the gut of an infected animal. (Source: The University of Sheffield)
Public Health Threat

A Superbug’s Rapid Path to Antibiotic Resistance

Researchers at the University of Sheffield have discovered how a hospital superbug Clostridioides difficile (C.diff) can rapidly evolve resistance to vancomycin, the frontline drug used in the UK. The scientists found that in less than two months the bacteria could develop resistance to 32 times the initial antibiotic concentration.

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