Zinc Bacitracin have good antibacterial activity against most Gram positive bacteria such as Staphylococcus aureus, Streptococcus, Enterococcus, Clostridium and Corynebacterium, and are also effective against actinomycetes and spirochetes. Sensitive bacteria rarely exhibit resistance to it.
Bacitracin (bacitracin, zinc bacitracin, and methylsalicylic acid bacitracin) is used as a drug feed additive in many animals to promote growth, and is often used in combination with antibiotics that have anti Gram negative properties, such as colistin and neomycin. Clinically, it is mainly used to promote animal growth and treat bacterial diarrhea in livestock as well as swine dysentery caused by Treponema.

Used to promote the growth of cattle, pigs, and poultry, and improve feed utilization efficiency.