Neutrophil cell and bacteria, SEM

Neutrophil cell and bacteria, SEM

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Caption: Neutrophil cell and bacteria. Coloured scanning electron micrograph (SEM) of bacteria (rod-shaped) and part of a neutrophil cell (lower left). The neutrophil cell (a type of white blood cell) is extruding material towards the bacteria. It may be forming a net-like structure to trap them. This is called a NET (neutrophil extracellular trap). This previously unknown method of cellular defence was discovered in 2004. These are Shigella sp. bacteria, one of the causes of dysentery, a severe intestinal inflammation.

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Keywords: anatomy, antigen, bacilli, bacillus, bacteria, bacterial, bacteriology, bacterium, cell, cells, coloured, cytology, defence, defending, digestion, digestive, disease, dysentery, eliminating, extracellular trap, false-colour, false-coloured, human body, immune, immune system, immunology, intestinal, medical, medicine, microbiological, microbiology, net, neutrophil, pathological, pathology, scanning electron micrograph, scanning electron microscope, sem, shigella, shigella sp., system, trapping, white blood cell

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