The article reports on the results of a study which explain LukED-mediated killing of neutrophils. The study revealed that leukotoxin ED (LukED) targets CXC-chemokine receptor 1 (CXCR1) and CXCR2 and efficiently kills neutrophils, which are the most important cell type for Staphylococcus aureus infection control. The study found that DR4- nor DR5- mutated LukE combined with LukD could kill neutrophils while killing of CCR5-positive cells was abolished by DR5-mutated LukE.