Used primarily as an antibiotic to treat bacterial infections, especially tuberculosis. It works by inhibiting protein synthesis in susceptible bacteria, leading to bacterial cell death. Commonly administered in combination with other antibiotics to prevent resistance development. Also used in veterinary medicine to control bacterial infections in livestock. In agriculture, applied to manage bacterial diseases in crops, such as fire blight in apples and pears. Widely utilized in cell culture labs to prevent bacterial contamination in media.