This product has broad-spectrum antibacterial activity, especially high antibacterial activity against aerobic gram-negative bacteria. It has good antibacterial activity against most bacteria in the Enterobacteriaceae family, including Citrobacter, Enterobacter, Escherichia coli, Klebsiella, Proteobacter, Salmonella, Shigella, Vibrio, Yersinia, etc. in vitro. It also has antibacterial activity against multidrug-resistant bacteria. Penicillin resistant Neisseria gonorrhoeae, enzyme producing Haemophilus influenzae, and Moraxella all exhibit high antibacterial activity.