Shigella boydii
Shigella boydii is a Gram-negative bacterium of the genus "Shigella". Like other members of the genus, "S. boydii" is a nonmotile, nonsporeforming, rod-shaped bacterium which can cause dysentery in humans through fecal-oral contamination. "Shigella boydii" is the most genetically divergent species of the genus "Shigella". There are 19 known serotypes of "Shigella boydii". "S. boydii" is restricted to the Indian subcontinent. The species is named after the American bacteriologist Mark Frederick Boyd.