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A Microbial Biorealm page on the genus Shigella


Higher order taxa

Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacteriales; Enterobacteriaceae


Shigella boydii; S. dysenteriae; S. flexneri; S. sonnei

Description and significance

Shigiella is a non spore forming gram negative bacteria that aids in the facilitation of intracellular pathogens. It is able to survive the proteases and acids of the intestinal tract and infections to hosts can be caused from a very low dose. As little as 10 to 100 bacteria are needed to cause infection.

Genome structure

The four difference species of Shigella vary greatly in the genomic structure. The largest species S. sonnei contains 4,825,265 base pairs. S. flexneri contains 4,607,203 base pairs, S. boydii contains 4,519,823 base pairs and the smallest species S. dysenteriae contains 4,369, 232 base pairs.

Cell structure and metabolism

Interesting features of cell structure; how it gains energy; what important molecules it produces.


Habitat; symbiosis; contributions to the environment.


How does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.

Current Research

Enter summarries of the most rescent research here--at least three required


[Sample reference] Takai, K., Sugai, A., Itoh, T., and Horikoshi, K. "Palaeococcus ferrophilus gen. nov., sp. nov., a barophilic, hyperthermophilic archaeon from a deep-sea hydrothermal vent chimney". International Journal of Systematic and Evolutionary Microbiology. 2000. Volume 50. p. 489-500.

Edited by student of Dr. Kirk Bartholomew