STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Pus. Coloured scanning electron micrograph (SEM) of a collection of neutrophils (a type of white blood cell) from the site of an infected skin wound. During infection, macrophages release cytokines which trigger neutrophils to seek the site of infection by chemotaxis. Magnification: x2500 when printed at 10 centimetres wide.
Model release not required. Property release not required.