Antibiotic Susceptibility Testing is a laboratory method used to determine the effectiveness of antibiotics against specific bacteria. This testing helps healthcare providers choose the right antibiotic for treating infections, ensuring that the selected medication can effectively kill or inhibit the growth of the bacteria causing the illness. The process typically involves isolating the bacteria from a patient sample and exposing it to various antibiotics in controlled conditions. The results indicate which antibiotics are effective and which are not, guiding treatment decisions and helping to combat antibiotic resistance, a growing public health concern.