New test targets salmonella

center_img strains of salmonella are captured by microcantilevers decorated with peptides that have unique binding affinities to different strains of the pathogen. When a peptide catches a bacterium, the cantilever bends ever so slightly, due to a mismatch in surface stress on the top and bottom. A fine laser trained on the mechanism catches that motion and triggers the alarm. The sensor was developed at Rice University. The technique could greatly simplify the food industry’s tests for pathogens. (Credit: Jinghui Wang/Rice University) box held by Rice University graduate student Jinghui Wang, left, with Rice biomolecular engineer Sibani Lisa Biswal, contains a tiny array of microcantilevers functionalized to detect a variety of salmonella pathogens. (Credit: Jeff Fitlow/Rice University)last_img read more