Mycoplasma pneumoniae clinical application of the reference value is detected by passive agglutination method, the main detection is serum Mycoplasma pneumoniae antibody, antibody is mainly IgM antibody, the normal titer is <1:40, if >1:40, there is a weak positive possibility, if >1:80, Mycoplasma pneumoniae antibody is positive. Mycoplasma pneumoniae can cause Mycoplasma pneumoniae inflammation, the main pathological changes are mainly interstitial pneumonia, also known as primary atypical pneumonia, mainly through the droplet to spread, the incubation period of 2-3 weeks, if Mycoplasma pneumoniae antibody is positive, it means that the patient is infected with Mycoplasma pneumoniae, infection with Mycoplasma pneumoniae will trigger a series of respiratory tract infections, such as headache, sore throat, fever, cough, even interstitial pneumonia and so on. Symptoms.