Blood cultures for colds and fevers can be used to find pathogens and target medications. 1. Finding pathogens: A large part of the fever is caused by pathogens invading the body. At this point, it is important to find out what kind of pathogen is involved. Blood culture is the process of inoculating blood onto a culture medium that allows the bacteria in the blood to grow and multiply. This makes it possible to identify them and find the pathogen causing the fever. 2. Targeted medication: Once the pathogens are found, drug sensitivity tests, or drug sensitivity tests, can be performed to determine which antibiotics they are sensitive to, so that the medication can be targeted and the treatment will be more accurate. Instead of blindly administering the treatment, the body will develop drug resistance. Usually when the temperature exceeds 38.5 degrees, chills for the exclusion of bacteremia, consider perfect blood culture. Cold fever does not go down, chills, nausea, vomiting and other symptoms, you should go to the hospital as soon as possible to see a doctor, if necessary, perfect blood culture, so as not to delay the disease.