valnemulin mainly exerts antibacterial effects, but it also has bactericidal effects at high concentrations. This drug has high activity against Staphylococcus, Streptococcus, and Actinobacteria pleuropneumoniae, but has poor inhibitory effects on Escherichia coli and Salmonella. It is worth noting that this product is highly sensitive to mycoplasma, spirochetes, and intracellular Lawsonia, thus it can effectively prevent and treat related diseases such as wheezing, swine dysentery, and proliferative enteritis.