Oxytetracycline is an antibacterial drug. Oxytetracycline can be used clinically for specific infectious diseases, such as epidemic typhus and endemic typhus, and also for chlamydial infectious diseases, such as parrot fever and other related diseases. In addition, it can also be used for regression fever, cholera, and also for other infectious diseases caused by sensitive bacteria, as the resistance of hygromycin is still serious at present. Therefore, nowadays, oxytetracycline can be mainly used for some specific pathogenic bacteria, which are very sensitive to oxytetracycline for infectious diseases. In conclusion, oxytetracycline is an antibacterial drug, mainly used for the treatment of infectious diseases.