Blood culture can check for more diseases, mainly the presence of bacteremia, sepsis, septicemia, if there is no such disease, there is no major harm can be assured, if once the blood culture is found to have bacteria, it is very likely to be sepsis, bacteremia or sepsis, need to be treated as soon as possible, otherwise these pathogenic bacteria will spread to all organs of the body with the blood flow, causing organ failure, the patient will soon die. So the blood culture check bacteria, common is Gram-negative bacilli, adults to negative bacilli, if children, can be positive cocci, negative bacilli most predominantly Escherichia coli, Klebsiella pneumoniae, Citrobacter, Pseudomonas aeruginosa, etc., but the most is Escherichia coli and Klebsiella pneumoniae, so the blood culture most predominant negative bacilli, pathogenic bacteria are these two. In terms of cocci, one is more Staphylococcus aureus, and streptococcus relatively more, so the blood culture if the disease can be detected, the need for timely treatment, some even need immediate medication within half an hour, especially some fungal infections, the mortality rate is also higher, the need for immediate medication in accordance with drug sensitivity, but the blood culture will generally not wait out the culture identification results and drug sensitivity results when the doctor has used drugs, if there is a positive, such as blood culture, can generally If there is positive, such as blood culture, generally 8-10ml of blood into which culture, when there is bacterial growth, need to immediately as a smear, observe what form of bacteria, is the bacillus, fungi, or coccus, immediately as a critical value reported to the doctor, this is a negative bacillus, the doctor will be based on the negative bacillus drugs to immediately on the drug, so that the disease can be controlled, drug sensitivity results can be changed after the drug.