Which term is used to describe bacteria in the bloodstream that are actively reproducing?

The term that describes bacteria in the bloodstream that are actively reproducing is septicemia. This condition occurs when bacteria not only enter the bloodstream but also begin to multiply, leading to a more severe systemic infection. Septicemia is often associated with sepsis, a life-threatening response to infection that can lead to tissue damage and organ failure.

In contrast, bacteremia refers specifically to the presence of bacteria in the bloodstream but does not necessarily indicate that these bacteria are reproducing or causing disease. Hyperthermic refers to an elevated body temperature, usually due to excessive heat exposure or other factors, and does not pertain to bacterial activity. Psychrophilic describes organisms, particularly bacteria, that thrive at low temperatures, which again is unrelated to the context of bacteria in the bloodstream. Thus, septicemia is the most accurate term for bacteria that are actively reproducing within the bloodstream, indicating a serious health concern.