Etest

An Etest is a laboratory method used to determine the smallest amount of an antibiotic needed to stop a bacteria from growing, helping doctors choose the right medication. It involves placing a plastic strip with a gradient of the antibiotic onto a gel that contains the bacteria. After incubation, a clear point on the strip shows the concentration that inhibits bacterial growth. This precise measurement helps ensure effective treatment while avoiding unnecessary higher doses. The Etest is accurate, easy to perform, and useful for testing bacteria's resistance to antibiotics.