Chlamydia and mycoplasma are two types of pathogenic microorganisms, in which chlamydia has a cell wall and parasitizes mainly inside the cell, while mycoplasma has only a cell membrane and no cell wall and needs to attach to the surface of the cell membrane to parasitize. Both have a part that can infect the human body and cause disease, possibly leading to respiratory infections, such as bronchitis with coughing and coughing, or in severe cases, pneumonia, and in milder cases, possibly just sneezing, runny nose and other symptoms of upper respiratory tract infections. The corresponding pathogenic microorganism can be Mycoplasma pneumoniae, Chlamydia pneumoniae, or Chlamydia psittaci. Some of these pathogenic microorganisms, such as Ureaplasma solani or Chlamydia trachomatis, can infect the human genitourinary tract and cause such symptoms as frequent urination, urinary urgency, itching of the urethra, or a slightly dilute purulent discharge from the urethra. In addition, Chlamydia trachomatis can cause trachoma and can also cause lymphogranuloma venereum.