Does a positive self-test equal infection? Is a second medical visit required?Expert response

Does a positive self-test equal infection? Is a second medical visit required?Expert response


Recently, many places have entered the season of high incidence of respiratory infectious diseases, among which Mycoplasma pneumoniae infection is still the “mainstream”. Worried about the possibility of cross-infection when going to the hospital for examination, some people choose to purchase Mycoplasma pneumoniae self-test kits online for testing. Are the test results of this self-test box accurate? Does a positive self-test equal infection?

CCTV reporter Hao Jiaqi: The Mycoplasma pneumoniae IGM antibody detection kit includes diluent, test card and straw. When using it, drop blood on the test card and wait for 10 minutes to get the result.

On the Internet, some consumers shared their experience of using the self-test box. Some people think that it is convenient and quick, and reduces the risk of cross-infection. However, some people reported that it was difficult to operate and the results were inaccurate during use. Experts say that currently, most of the self-test kits sold on e-commerce platforms use colloidal gold and immunochromatography to detect IGM antibodies or antigens of Mycoplasma pneumoniae, which can allow people to quickly determine whether they are infected with the virus, but their accuracy and sensitivity are limited. Uncertainty.

Lang Zhongping, deputy chief technician of the Laboratory Department of Shanghai Pulmonary Hospital: Especially the interpretation of the subsequent results may be misleading to citizens. There are currently the most Mycoplasma pneumoniae IGM antibody tests on the market, and the test results are often negative for people with low immunity or those who are in the window period of infection. On the contrary, if the test result is positive, it does not mean that the infection is caused by Mycoplasma pneumoniae. It is likely to be a previous infection. Therefore, I do not recommend that citizens buy these test kits and test themselves.

According to experts, there are strict guidelines and procedures for the clinical diagnosis of Mycoplasma pneumoniae. In addition to laboratory testing, imaging examinations and routine tests are also very important and play an auxiliary role in doctors’ diagnosis and treatment. If symptoms occur, you can prescribe appropriate medicine, but you must closely observe whether it develops into severe symptoms.

Lang Zhongping, deputy chief technician of the Laboratory Department of Shanghai Pulmonary Hospital: After taking these medicines, the fever did not go down, and some severe coughs, chest tightness, and difficulty breathing occurred. However, some children become lethargic, do not want to eat, and develop wheezing after symptomatic treatment. They should go to the hospital for treatment as soon as possible.

Experts remind that winter is the season with high incidence of respiratory diseases, and citizens should pay attention to disease prevention, such as washing hands frequently, ventilating more, wearing masks, and keeping warm.

When should parents take their children to see a doctor?

If a child has symptoms of suspected respiratory infection, when should parents take the child to a doctor? What should I pay attention to when seeing a doctor?

Experts remind that at present, the majority of children receiving medical treatment are influenza, and there are also cross-infections with Mycoplasma pneumoniae, adenovirus, respiratory syncytial virus, rhinovirus and other viruses. Body temperature and mental state are the two most important indicators for determining whether to take your child to the hospital.

Ye Leping, Chief Physician of Pediatrics at Peking University First Hospital: For example, if a child has low-grade fever and occasional cough, and the symptoms are not serious, you should not rush to the hospital for the time being. If the fever exceeds 38.5°C and lasts for more than 48 hours, especially for infants and young children under three years old with high fever and cough, they need to see a doctor in time. Even if some children do not have a high fever, if they develop listlessness, loss of appetite, vomiting and diarrhea, or even difficulty breathing and lack of rosy complexion, it is recommended to seek medical treatment in time.

Experts remind parents that during the treatment process, it is recommended to bring the results of previous examinations from other medical institutions with them to save time for examinations and waiting. At the same time, it is recommended to record the child’s medication, maximum fever temperature, disease course and symptoms and other information and inform the doctor during the visit. This can better help the doctor clearly understand the child’s condition and treat it accordingly.

During the hospital visit, parents should wear masks for their children to avoid increasing the risk of cross-infection. They should wash their hands and disinfect clothes in time when they return home. During the home care of children, attention should be paid to opening windows for ventilation, trying to avoid going to crowded places, and maintaining a certain social distance.

Does a child with a chronic cough need to seek medical treatment a second time?

Many children develop cough symptoms after their respiratory infection improves, or even have a long-lasting cough. Does this situation require a second visit to the doctor, and how should it be handled?

The first thing to make clear is that coughing is a symptom and a protective reflex, not an independent disease. Coughs are caused by other diseases. Coughing can clear respiratory secretions and foreign bodies in the airways. In layman’s terms, it means cleaning out the “garbage” in the respiratory tract. If the child’s cough is not very severe or frequent, you can observe it first. If the cough gradually subsides, there is no need to go to the hospital.

Sang Tian, ​​deputy chief physician of pediatrics at Peking University First Hospital: This is called post-infectious cough, especially after mycoplasma infection, the cough can last for a long time. If a child has a very severe cough that leads to suffocation, or even excessive phlegm that cannot be coughed up, the child still needs to go to the hospital to adjust the medication. However, it does not necessarily mean that the longer the cough lasts after infection, the more serious the infection will be. There is no direct correlation.

If the cough is severe and affects sleep, you can use nebulizer or cough and phlegm-reducing drugs suitable for children under the guidance of a doctor for relief. If the cough lasts for more than 1 month, it is recommended to seek medical treatment in time and conduct relevant examinations under the guidance of a doctor.



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