CBC findings in bacterial pneumonia?

CBC findings in bacterial pneumonia?

• A. Decreased white blood cell count
• B. WBC count is generally unrelated to pneumonia
• C. Normal white blood cell count
• D. Elevated white blood cell count

Answer: (D)

Bacterial pneumonia typically triggers an acute inflammatory response with neutrophil-dominated leukocytosis. The bone marrow increases production, so a CBC commonly shows an elevated white blood cell count, often with a left shift indicating immature neutrophils. While a normal WBC can occur in some patients (such as the elderly or those with immunosuppression), and a very low WBC would suggest other problems, the classic pattern for uncomplicated bacterial pneumonia is an elevated WBC. Therefore, an elevated white blood cell count is the best answer.

Bacterial pneumonia typically triggers an acute inflammatory response with neutrophil-dominated leukocytosis. The bone marrow increases production, so a CBC commonly shows an elevated white blood cell count, often with a left shift indicating immature neutrophils. While a normal WBC can occur in some patients (such as the elderly or those with immunosuppression), and a very low WBC would suggest other problems, the classic pattern for uncomplicated bacterial pneumonia is an elevated WBC. Therefore, an elevated white blood cell count is the best answer.