Studies on the Family Accumulation on the View of Serological-typing of E. Coli as Intestinal Bacterial Flora

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In Japan, dysentery-bacilli have sedentaried in their linings. I think that their enveroment and their dietary lives have given many chances for the infecting of dysenterybacilli. And so, I examined the condition from the movement of E. coli of their stools, that is, I tried to examine the distribution of the same serological type of E. coli of their stools in members of one family. For this porpose, I took farm-families as the object. Numbers of population mere 819 and Numbers of families mere 172. The result is as follows. 1) The degree of the family-accumulation having the same type of E. coli in their stools was 28.5%. 2) The degree of the apperance which was over 50% of the same type in the same family-members was 14.7%. 3) The degree found the same type from the same body by twice examination was 19.3%. 4) On the view of typing of children-stools the effect from their mother's coli-type was more than from their father's coli-type. 5) 50% of children befor 4 years old showed the same coli-type in their stools as ther mather's type.