Epidemiology of Shigellosis

What are the epidemiologic features and species most commonly associated with shigellosis? 

  • Shigella infections in developed countries such as the United States are more commonly associated with Shigella sonnei strains. 
  • Shigella flexneri infections are more common in developing countries and are the second most common Shigella species isolated from patients in the United States. 
  • Shigella dysenteriae is less common but can cause of a more severe infection and epidemic dysentery.
  • In the United States, shigellosis is most commonly associated with children in daycare settings, institutionalized individuals, and among men who have sex with men.
  • Shigellosis is also an important cause of watery diarrhea and dysentery among travelers.
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