Blood culture can detect bacteria such as Gram-positive and Gram-negative bacteria, and in addition to bacteria, fungi can also be clearly found. 1. Gram-positive bacteria: blood culture can detect gram-positive bacteria such as Staphylococcus aureus, Streptococcus, Bacillus anthracis, Diphtheria bacillus, Tetanus bacillus and so on. 2. Gram-negative bacteria: blood culture can also detect dysentery bacillus, Escherichia coli, typhoid fever bacillus, meningococcus, streptococcus, pneumococcus and other gram-negative bacteria. 3. Fungus: blood culture can not only check out bacteria, but also clearly check out Candida and other fungi. Through blood culture, the genus of infection can be clarified, which helps to diagnose bacterial infection and fungal infection, and is of great significance to the diagnosis and treatment of bacteremia or fungemia.