The scientific term for the presence of bacteria in the blood is bacteremia, which needs to be treated with antibiotics, of which there are a wide variety, and blood cultures need to be done first to clarify the type of bacteria, and the appropriate antibiotic is selected based on the results of the drug sensitivity. When bacteremia occurs, it needs to be treated with antibiotics that are sensitive to that type of bacteria, so a drug sensitivity test, i.e., a blood culture, is needed. 1. For gram-negative bacterial infections, quinolones and third-generation cephalosporins can be chosen for treatment, represented by levofloxacin, cefoperazone and cefotaxime. 2. Gram-positive bacterial infections can be treated with antibiotics such as vancomycin. 3. For severe infections, drugs such as meropenem, imipenem, tigecycline and linezolid can be used. 4. Before the results of drug sensitivity are clear, empirical anti-infection treatment can be carried out first, and the drugs include cephalosporins. Antibiotics need to be used with caution, the use of drugs under the guidance of a doctor, not unauthorized use of drugs.