HERBAC® is a formula made of eight kinds of herbal extract: Coptis Chinensis extract, Phellodendron chinensis extract, Radix Astragalus extract, Radix Pulsatilla extract, Shrubby Sophora extract, Eucommia ulmoides Extract, Heartleaf Houttuynia extract, echinacea extract used for fowl cholera. staphylococcus aureus, Streptococcus, pneumococcus and other diseases, The infections of the respiratory tract, digestive tract, urinary tract biliary tract, various soft tissue infections and duck serositis in livestock and poultry caused by Lans-positive bacteria have a good effect. All four products all have the function that Antibacterial effects, especially for Gram-negative bacteria, and Gram-positive bacteria.