First, let’s look at the first item in the test order, CRP. CRP is C-reactive protein. Many large hospitals carry out trace blood CRP examinations. This is a preliminary screening test that can determine whether the child has a bacterial infection. White blood cells can also determine whether a child has a bacterial infection, but CRP is more sensitive and appears earlier than white blood cells. At the same time, CRP is also an indicator of the body's response to disease. If the value is several times higher than the normal value, it often indicates that multiple organs in the patient's body are damaged. In addition, CRP is also related to some serious diseases, such as infectious mononucleosis, Kawasaki disease, rheumatic fever, etc.

Second, look at the number of white blood cells (WBC). Many parents only know whether the WBC count is high when they get the test sheet. Generally speaking, if the number of white blood cells is greater than 10,000, it indicates that the child has a bacterial infection and needs antibiotics. The higher the number of white blood cells, the more virulent the bacteria are or the greater the number of bacteria.

But sometimes the white blood cells are extremely high, which does not necessarily mean bacterial infection. There are also lymphocytes and neutrophils in the white blood cells. If a child suffers from infectious mononucleosis, the number of lymphocytes in his body is particularly high, so the total number of white blood cells is also very high, which may reach 20,000 or even 30,000. In fact, most of them are lymphocytes, not neutrophils. cell.

Leukocytes, formerly known as white blood cells, are a type of cell in the blood. White blood cells, often called immune cells, are colorless cells found in the blood and tissues of humans and animals. It has a cell nucleus and can perform deformation movements. White blood cells generally have active mobility. They can migrate from intravascular to extravascular, or from extravascular tissue to intravascular. Therefore, in addition to existing in blood and lymph, white blood cells also widely exist in tissues other than blood vessels and lymphatic vessels. There are five types of white blood cells in the blood. From the perspective of volume, from small to large, they are lymphocytes, basophils, neutrophils, eosinophils and monocytes.

Third, look at the percentage of neutrophils. The higher the value, it means that the disease is still developing and may be further aggravated. Neutrophils mainly target bacteria. When a child's body is infected by bacteria, neutrophils will increase to kill the bacteria. If the neutrophil percentage decreases and the lymphocyte percentage increases accordingly, it indicates that the child may be infected by a virus.

Fourth, look at the absolute value of neutrophils. If it is lower than the normal value, it indicates viral infection. The lower the absolute value of neutrophils, the more serious the viral infection is. If it is higher than normal, it indicates a bacterial infection. In some children, the total number of white blood cells in their body is not very high, but the absolute value of neutrophils is very high, which indicates that the child's fever will become more and more severe.

Fifth, look at the platelets. The higher the platelet value, the more infections the child has. This child's platelets are normal. Many children with repeated infections have platelet values ??of 4 million or 5 million.

Sixth, look at the absolute value of eosinophils (EOS) and basophils (BASO). They are one of the indicators for judging whether a child is allergic. We can see from the table: The absolute value of this child's eosinophils is 0.92, and the normal value is 0.05-0.56. It is much higher than the normal value, indicating that the child's allergy is serious, and that the child's illness this time is due to allergies. Caused by infection.

Seventh, look at the absolute value of lymphocytes and the percentage of lymphocytes. What do lymphocytes do? Lymphocytes fight viruses mainly by secreting antibodies. If these two values ??are higher than normal, it means that the child may be infected by a virus.

Eighth, look at the percentage of monocytes and the absolute value of monocytes. Monocytes are phagocytes, and phagocytes are effective against viruses and bacteria. Whether it is a viral infection, a bacterial infection, or a mycoplasma infection, phagocytes will be the first to appear. The higher the monocyte count, the more severe the child's fever is and the longer it lasts. From the table, we can see that its normal value does not exceed 10. If a child's monocyte percentage exceeds 18, he will definitely have a high fever for more than 3 days before getting better, no matter what medicine is used.