The systemic condition often associated with severe infections caused by the presence of bacteria in the bloodstream is known as .

Septicemia, can be called sepsis

Explanation:

Septicemia, can be called sepsis, it is a life-threatening complication which may be due to infiltration and proliferation of bacteria from another infection into the blood and to the entire body. It's aftermath it's a chain of changes that destroys multiple organ systems, causing organs failures, oftentimes leading to death.

Invasion of bacteria into the body, may lead to severe illnesses and at times death. In Septicaemia, the bacteria leads to blood poisoning that develops into sepsise.

Early signs of sepsis to look for are:

fever, common cold, high heart rate and breathing, followed by shortness of breathm, alteration in mental state like feeling sleepy, confused, or losing interest.

oxygen +1 most likely