Shigella

Shigella /Shi·gel·la/ (shĭ-gel´ah) a genus of gram-negative bacteria (family Enterobacteriaceae) which cause dysentery. They are separated into four species on the basis of biochemical reactions: S. dysente´riae, S. flexne´ri, S. boy´dii, and S. son´nei.

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shigella /shi·gel·la/ (shĭ-gel´ah) pl. shigel´lae   an individual organism of the genus Shigella.

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Shi·gel·la (sh-gl)

n.

A genus of gram-negative, aerobic, nonmotile, rod-shaped bacteria that includes some species that cause dysentery in humans.

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Shigella

[shigel′ə]

Etymology: Kiyoshi Shiga, Japanese bacteriologist, 1870-1957

a genus of gram-negative pathogenic bacteria that causes gastroenteritis and bacterial dysentery, such as Shigella dysenteriae. It is also associated with hemolytic uremic syndromes. See also shigellosis.

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shift to right or left,

n an arbitrary description of an increase in the number per unit volume of immature (shift to left) or mature (shift to right) forms of neutrophils, in the differential counting system of Schilling.

Shigella,

n a genus of gram-negative pathogenic bacteria that causes gastroenteritis and bacterial dysentery.

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Shigella

a genus of gram-negative rods in the family Enterobacteriaceae. There are four subgroups or species. The type species, S. dysenteriae, causes bacillary dysentery in humans and nonhuman primates. Other animals are resistant to infection, but organisms have been isolated from dogs without clinical signs.

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shigella

pl. shigellae. See Escherichia coli Shigella.

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Shigella

Microbiology A genus of gram-negative bacilli of the family Enterobacteriaceae, and major cause of bacterial dysentery