HABITAT AND TRANSMISSION
Shigella species are found only in the human intestinal tract.
Carriers of pathogenic strains can excrete the organism up to two weeks after infection and occasionally for longer periods.
Shigella are killed by drying. Shigella are transmitted by the fecal-oral rout.
The highest incidence of Shigellosis occur in areas of poor sanitation and where water supplies are polluted.