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The biosensor uses an enzyme-based biofuel cell, antibodies called aptamers and a bacterial elimination mechanism to make water decontamination faster and easier. Originally published by Christopher McFadden at https://interestingengineering.com on Mar 02, 2025           Stock image of a biosensor.                                                  grechina/iStock A team of researchers has developed a new self-powered biosensor that can detect Escherichia coli (E. coli) bacteria in drinking water and destroy them in situ (on site). This discovery could have enormous ramifications for providing s afe drinking water worldwide . Traditional methods , such as culturing or polymerase chain reaction (PCR), are time-consuming and labor-intensive . They also require specialized equipment and trained sta...

  Originally published by University of California - San Diego, on August 10, 2023 Upper: The bacterium A. baylyi can incorporate DNA from its environment through natural competence. This allows horizontal gene transfer and the integration of cell-free DNA into the A. baylyi genome. Lower: Researchers engineered A. baylyi to find the mutated KRAS gene, which helps colorectal cancers grow. Detection of tumor DNA activated an antibiotic resistance gene to confirm that a tumor was found. Credit: Cooper et al Pushing into a new chapter of technologically advanced biological sensors, scientists from the University of California San Diego and their colleagues in Australia have engineered bacteria that can detect the presence of tumor DNA in a live organism . Their innovation, which d etected cancer in the colons of mice , could pave the way to new biosensors capable of identifying various infections, cancers and other diseases. The advancement is described in the journal Scienc...