The difference between viral and bacterial infections is the pathogenic microorganism. The pathogenic microorganisms of viral infections are viral and are pathogenic microorganisms without a cellular structure. In contrast, the pathogenic organism of a bacterial infection is a bacterium, which has a cellular structure. However, the exact determination depends on bacterial culture and the detection of antigenic antibodies in blood samples. Both bacterial and viral infections can cause infections of the respiratory and digestive tracts, and this can be difficult to distinguish from symptoms. There is also a difference in treatment between viral and bacterial infections, as antiviral drugs may be effective in viral infections. In the case of viral infections, antiviral drugs may be effective, while in the case of bacterial infections, only antibiotics are effective. Antibiotics cannot treat viral infections, and antiviral drugs cannot treat bacterial infections, which are some of the differences in treatment.