Blood cultures are mainly tests for bacterial infections and can detect bacteria as well as fungi. It is possible to diagnose certain diseases such as meningitis, pneumonia, lung abscess, septic arthritis, myelitis, cholecystitis, mesenteritis, colitis, and sometimes transient bacteraemia due to infections that occur as a result of surgery or due to trauma. Persistent bacteremia occurs in some diseases, such as infectious endocarditis, thrombophlebitis, and other endovascular infections, and the diagnosis is clarified by blood culture, which provides the main basis for treatment.