<unk>  is a genus of Gram-negative, facultative anaerobic, nonspore-forming, nonmotile, rod-shaped bacteria closely related to Salmonella. The genus is named after Kiyoshi Shiga, who first discovered it in 1897.
The causative agent of human<unk> sis,<unk>  causes disease in primates, but not in other mammals.[page needed] It is only naturally found in humans and apes. During infection, it typically causes dysentery.<unk>  is one of the leading bacterial causes of diarrhea worldwide. Insufficient data exist, but conservative estimates suggest<unk>  causes about 90 million cases of severe dysentery, with at least 100,000 of these resulting in death each year, mostly among children in the developing world.
Shigella
Salmonella
Yersinia
Salmonella enterica
Vibrio cholerae
Clostridium difficile
Francisella
Salmonella enteritidis