shi·gel·la 
(shĭ-gĕlə)
(shĭ-gĕlə)n. pl. shi·gel·lae (-gĕlē) also shi·gel·las
Any of various nonmotile, rod-shaped bacteria of the genus Shigella, which includes some species that cause dysentery.
[New Latin Shigella, genus name, after Kiyoshi Shiga (1870-1957), Japanese bacteriologist.]