Neutrophils are so named because they are not well stained by either eosin, a red acidic stain, nor by methylene blue, a basic or alkaline stain. Neutrophils, are also known as "segs", "PMNs" or "polys" polymorphonuclears. They are the body's primary defense against bacterial infection and physiologic stress. Normally, most of the neutrophils circulating in the bloodstream are in a mature form, with the nucleus of the cell being divided or segmented. Because of the segmented appearance of the nucleus, neutrophils are sometimes referred to as "segs.
Neutrophils are the most abundant type of white blood cells. In healthy adults, they typically constitute about 50 to 70 percent of white blood cells and function as the first line of defense against bacteria and other foreign organisms. Neutrophils are differentiated from other cells under the microscope by their segmented nucleus and neutral pink stain hence the name Neutrophil. They respond to inflammation and fight bacteria mainly by their swallowing function a process called Phagocytosis. CBC is a complete blood count. It is performed by first taking a blood sample from the patient using a simple finger prick or venous draw.
Neutrophils are a type of white blood cell that helps heal damaged tissues and resolve infections. Neutrophil blood levels increase naturally in response to infections, injuries, and other types of stress. They may decrease in response to severe or chronic infections, drug treatments, and genetic conditions.
Serial leucocyte counts were made on 24 babies of less than 33 weeks' gestation during the first 5 days of life. The values for mature neutrophils show two important differences from those obtained by previous workers studying term babies, in that the counts were much lower on the first day of life and showed a wider range of values at all ages. Full text is available as a scanned copy of the original print version.