When parents visit a doctor for a child with a cold or cough, they will hear the doctor mention whether the child has mycoplasma infection, and some parents will ask the doctor whether the child has mycoplasma infection after hearing about it from family members or friends or learning about it themselves. So, what is mycoplasma? In short, mycoplasma is a pathogenic microorganism between bacteria and viruses in size, and although it is not strictly an infectious disease, the population is generally susceptible to it. It is not strictly an infectious disease, but the population is generally susceptible to it. The infection rate is higher in school-age children, and it also occurs in infants and young children. In mild cases, the symptoms of upper respiratory tract infection are common; in moderate cases, bronchitis; and in severe cases, pneumonia and other organ damage are combined. The doctor makes the diagnosis by combining the child’s symptoms, signs, and laboratory indicators. It should be noted here that the laboratory indicators have a reference value, but they are not the only indicators to confirm the diagnosis. In addition, there are differences between blood samples and throat swabs. Therefore, it is still necessary to ask the doctor to make a final judgment in conjunction with the condition. Parents need to pay attention to a few points: 1, the onset of at least 1 week of blood tests for mycoplasma may be meaningful, too early may not be detected. Except for throat swabs. 2, if the blood test, try to check the mycoplasma antibody IgM, this is to reflect the child currently has no mycoplasma infection, there is an IgG, this is to reflect the previous infection, but a longer course of the disease can also be used as a diagnostic indicator, but need to indicate the titer, that is, if the report is only marked IgG positive, the significance is not great, must also have 1:80, 1:160, 1:320, etc., to have The diagnostic significance must be accompanied by 1:80, 1:160, 1:320, etc. This point please ask your parents to ask the hospital report before the blood test to see if the titer shows, if not, the reference significance of this test will be small. Now there is a newer blood test or throat swab DNA, the accuracy is higher, but the sensitivity is also high, must reach a certain titer or more to have meaning. 3.When is it necessary to test for mycoplasma antibodies: children with a cough that lasts for more than 2 weeks and is not obvious or even aggravated by general symptomatic treatment; children with similar illnesses among their classmates or daily contacts; coughs with mainly dry symptoms, mostly paroxysmal; and long-term chronic coughs also require routine testing to exclude the possibility of mycoplasma infection.