sexual oral-anal contact outbreaks have occurred among men who have sex with menįlies that come into contact with contaminated feces or water have also been linked to the spread of infection.drinking contaminated liquids, such as recreational water from rivers, lakes, and other coastal waters.washed with water contaminated with feces.eating contaminated foods, which become infected when:.The illness is highly infectious and can also be spread from person to person. Shigella bacteria spread through the direct or indirect fecal-oral route. It can produce a potent cytotoxin known as Shigatoxin. dysenteriae is considered the most virulent. In recent years, approximately 880 cases of shigellosis have been reported annually in Canada. Shigellosis is a common cause of diarrhea in Canada. Humans are the only natural reservoir for Shigella, however, prolonged outbreaks have occurred in primate colonies. Large numbers of bacteria then advance to the colon and enter the colonic epithelium. After ingestion, the bacteria progress from the stomach to the small intestine, where they multiply. Shigella bacteria are extremely acid-tolerant. Shigellosis is an acute infectious diarrheal disease caused by a group of bacteria called Shigella. Find detailed information on shigellosis for health professionals.
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