Leucomycin A5 is primarily used as an antibiotic in veterinary medicine to treat infections caused by susceptible bacteria in livestock and poultry. It is effective against a range of Gram-positive and some Gram-negative bacteria, making it useful for managing respiratory, gastrointestinal, and other bacterial infections in animals. Additionally, it is sometimes incorporated into animal feed as a growth promoter to enhance feed efficiency and overall health. In aquaculture, it is employed to control bacterial diseases in fish and shellfish, ensuring healthier stock and improved yields. Its application helps maintain animal health and productivity in agricultural and aquacultural settings.