Drug sensitivity test does not necessarily draw blood, which depends on the specific circumstances of the patient to determine what kind of specimens to take, as follows: 1, if the patient appears fever, chills, suspected that the patient has bacteremia or sepsis, it is recommended that the patient before the use of drugs to draw blood for blood culture; if the blood culture culture bacteria, the patient’s pathogenic bacteria for drug sensitivity test; if the blood culture did not culture the pathogenic bacteria, it is If the blood culture does not produce the pathogenic bacteria, the drug sensitivity test cannot be done; 2. In the case of lung infection, multiple bacteria can be detected in the sputum, and then the patient’s sputum can be retained for bacterial culture; 3. In the case of urinary tract infection, the pathogenic bacteria can be detected from the urine by retaining certain urine for urine bacterial culture. So comprehensive judgment, according to the patient’s specific situation, depending on the patient’s site of infection, and then according to the site of infection and then decide which part of the patient’s specimen to keep for culture.