These neutrophils are capable of engulfing up to 20 bacterial cells before they actually die off. Now, when these phagocytic cells actually die off as a result of engulfing too many bacterial cells that is when we form our pus. So basically the nutrient fields are granulocytes recruited to the infected area and engulfed bacterial cells and other harmful agents and kills them intracellularly. And that means inside that cell. So once they engulfed the pathogen they break down that pathogen and kill it off. And once they engulfed about 20 bacterial cells these essentially die off and begin to form pus.