Cytomegalovirus DNA testing focuses on checking for the presence of cytomegalovirus infection in the body. Cytomegalovirus DNA testing uses medical methods to detect the amount of cytomegalovirus DNA in the patient’s serum, urine, breast milk and other specimens. It provides a basis for early diagnosis and differential diagnosis of cytomegalovirus infection, and also helps to monitor the efficacy of patient treatment. A negative cytomegalovirus DNA test result suggests no infection. If the test is positive, it indicates cytomegalovirus infection, and the patient needs to improve the relevant examinations under the guidance of the doctor in a timely manner and take timely treatment measures to avoid aggravation of the disease. Cytomegalovirus DNA test results also need to be combined with clinical history, symptoms and other ancillary tests to make a comprehensive analysis of the disease, it is recommended that patients consult a doctor for a clear diagnosis and treatment.