What is the initial sign of infection that should be monitored for in a client with a shift to the left in WBC count?

The initial sign of infection that should be monitored in a client with a shift to the left in the white blood cell (WBC) count is an elevated temperature. A "shift to the left" refers to an increased number of immature neutrophils, typically indicating an ongoing infection or inflammation. Fever is a common systemic response to infection, as the body raises its temperature in an attempt to create an unfavorable environment for pathogens and enhance immune function.

When assessing a patient for signs of infection, an elevated temperature often appears first and can be a crucial indicator that the body is responding to a potential infectious process. Monitoring temperature is a standard part of clinical assessment, especially in the context of a shift in WBC count, as early detection of fever may lead to prompt intervention and treatment to control the infection. Recognizing this sign is vital for timely management and can help prevent further complications.