Introduction. Bacillary dysentery is caused by Shigella organism. Infections caused by Shigella species are an important cause of diarrheal disease, in both developing and developed countries In current study, different epidemiological aspects of shigellosis in Iran are discussed. Material and Material and Methods. In our research, different epidemiological aspects of Shigella including its species distribution were studied. To study the changes in epidemiological patterns of shigellosis in Iran, recently published reports on distribution of Shigella spp. were reviewed and then compared. Results. The results showed that recently epidemiological pattern of shigellosis is changed in Iran. Discussion. Epidemiological pattern of shigellosis in Iran is similar to those seen in developed countries. This finding may reflects hygienic improvement in the country in recent years.
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