Given the task definition and input, reply with output. In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Question: The reactivation of a latent cytomegalovirus in an immunosuppressed patient can lead to a severe systemic picture. How would the ethological diagnosis?
Options: <0> Detecting the specific IgG in the serum. <1> By urine culture in an advanced cell line. <2> By chain reaction of quantitative polymerase in the blood. <3> By detection of antigen in the urine. <4> By detection of specific IgM in the serum.
medicine