Species under shigella
I. S. dysenteriae (Group A)
II. S. flexneri (Group B)
III. S. boydii (Group C)
IV. S. sonnei (Group D)
Mot of shigella
(4 Fs) flies, fingers, food and feces and water by infected
person, fecal-oral route
Other names for S. dysenteriae
Shiga bacillus
Other names for S. flexneri
Strong’s bacillus;
Flexner’s bacilli
Other name for S. boydii
Boyd’s bacilli;
Newcastle-
Manchester’s bacilli
Other names for S. sonnei
Sonne-Ducal bacilli