抄録
The 38 paired sera obtained on the day of april 30th and september 10th 1955 from the heatlthy 8 years old children in Shobara city, Hiroshima prefecture were attested for the presence of the polio neutralizing antibody employing tissue culture HeLa tubes. The type distribution of first sera was I 71%, II 68% and III 68% which was in the similar range to Okayama area. Negative reading 3%, double type 18% and tripple type 32% and the remainder for one type. The 7 cases of negative reading in the first sera revealed type I positive in the secondand the elevation in the titer in type I in 4 cases already positive in the first. Thus during the summer 1955 it might be suggested that there was the type I epidemy in this area. The appearance of the type II and III antibodies in the second sera was observed partially.
