痢疾傳播地區很廣,發病率僅次於瘧疾和麻疹,對於勞動人民生産力和經濟上的損失是很大的。它流行的季節爲六月至十月,其中以八、九兩月爲最劇烈,十月以後逐漸下降。不分男女老幼,都可感染,以小兒和壯年的男子較爲常見,環境衛生不好的地區,最易流行。患過痢疾的人,並沒有永久的免疫力,所以有重複感染的可能。 Diarrheal diseases are widespread and their incidence is second only to malaria and measles. Productivity and economic losses to working people are substantial. Its popular season is from June to October, with August and December being the most violent and declining gradually after October. Regardless of the age of men, women and children, can be infected with children and young men are more common, poor sanitation areas, the most popular. People who have had dysentery do not have permanent immunity and are therefore likely to have repeated infections.