Which type of white blood cell is usually the first to attack pathogens?

Neutrophils are the type of white blood cell that typically act as the first line of defense in the body's immune response to pathogens. These cells are a key component of the innate immune system, and they are particularly adept at quickly responding to inflammation or infection.

When an infection occurs, neutrophils are attracted to the site through chemical signals released by the pathogens or damaged tissues. Once they arrive at the site of infection, neutrophils are capable of engulfing and digesting microorganisms through a process called phagocytosis. They also release enzymes and reactive oxygen species that can destroy pathogens.

This rapid response and ability to directly attack a wide range of pathogens, including bacteria and fungi, make neutrophils essential for the early phase of immune defense. Their ability to respond quickly helps limit the spread of infection and initiate the healing process.