Which of the following is defined as an infection located in the blood?

Bacteremia is defined as the presence of bacteria in the bloodstream. This condition indicates that bacteria have entered the circulatory system, which can happen during various medical procedures or infections. It's important to recognize that bacteremia can lead to more serious conditions, such as sepsis, if the bacteria begin to proliferate and trigger an overwhelming immune response.

In contrast, sepsis refers to a systemic response to infection that can result from bacteremia but also involves the body's entire immune response. Bacteriostatic, on the other hand, refers to substances that inhibit bacterial growth without necessarily killing the bacteria, and viremia describes the presence of viruses in the bloodstream. Therefore, the definition of bacteremia specifically aligns with the question regarding an infection located in the blood, making it the correct choice.