Nowadays, hospitals are using the “condensate test” to test for Mycoplasma pneumonia. Many parents have heard the term “mycoplasma potency” from their doctors, right? Do you know what the potency level is for mycoplasma infection? 75% of patients with mycoplasma pneumonia, in the second week of the onset of serum cold agglutinin potency of 1:32 or higher, 4 weeks to reach the peak, 6 weeks after the decline or disappear. Agglutinin potency of 1:64 or more than 4-fold increase in dynamic observation has diagnostic significance. The specificity of this test is not strong, many diseases such as infectious mononucleosis, cirrhosis, Raynaud’s disease, hemolytic anemia, paroxysmal cold hemoglobinuria, influenza, mumps testosterone and malaria, etc. can also appear positive, need to be combined with the clinical identification. Especially in infants and young children, the false positive rate is high. So don’t rush to the hospital when your child has a fever. Observe the child for a few more days. A common cold and fever will clear up in 3-4 days. The main thing is to keep an eye on your child’s temperature and use antipyretics if it exceeds 38.5 degrees. It is best to find a doctor to listen to the lungs, if the lungs breath sounds just sound a little thick, the problem is not big. But do not move to the hospital. Doctors usually test the child’s blood analysis and mycoplasma potency, but it is true that the false positive rate is too high in infants and young children, and it is likely that your child will be given 10 days of erythromycin or azithromycin for nothing. And in the hospital may not get better from this disease and get infected with something else.