Studies of Infectious Agents in Cases Suspective of Dysentery

Abstract

Isoation test of Shigella, pathogenic E. coli, Salmonera, Vibrio parahaemolyticus and Endameba histolytica were carried out with 555 sporadic cases suspective dysentery during the year 1964. The results were as follows:
Dysentery bacillus was isolated from 266 cases, V. parahaemolyticus from 63 cases, pathogenic E coli from 32 cases, Salmonella from 9 cases and E. histolytica from 1 case. The isolation rate in summer, (from June to September) which remarkably decreased as comared with that in autumb and winter, was 45.1 %(46 cases) in the 0-14 age group (102 cases) and 21.2 %(35 cases) in the group over 15 years of age. In the former group, the isolation rate of pathogenic E coli increased (13 cases: 12.7 %) and in the latter, that of V. parahaemolyticus elevated (59 cases: 35.8 %)
Sh. sonnei (96 cases) and Sh. flexneri 2a (69 cases) were predominant in shigella, O124: K72 (10 cases) and O136-K89 (4 cases) in pathogenic E coli. As for Salmonella, 6 types, i.e. S. typhi murium (2 cases), S. give (3 cases), S. heidelberg (1 case), S. potsdam (1 case) S. enteritidis (1 case) and S. anatum (1 case) were isolated.