What does the leukocyte count indicate in blood tests?

The leukocyte count, or white blood cell count, is a crucial indicator in blood tests that primarily assesses the immune response and helps detect infections. White blood cells are vital components of the immune system, responsible for protecting the body against infections, inflammation, and other diseases. An elevated leukocyte count may suggest infection, inflammation, or other immune responses, while a low count can indicate a compromised immune system or bone marrow issues.

The other options pertain to different assessments: blood sugar levels are measured by glucose testing, cholesterol levels are evaluated through lipid panels, and hydration status is typically assessed through markers like urine specific gravity or blood urea nitrogen. Each of these areas focuses on different aspects of health, but only the leukocyte count provides direct insight into the immune function and the body’s ability to respond to pathogens.