Belaia O S, Sutulova A A
Zh Mikrobiol Epidemiol Immunobiol. 1978 Jun(6):129-33.
The authors studied the properties of 115 strains of E. coli of serological group 03 isolated from 49 children and adults with acute intestinal disturbances. The majority of the children (82.9%) were aged under one year. Results of the study of the antigenic structure and biochemical properties permitted to differentiate the strains isolated into 3 serological types, with the prevalence of strains of type O3 : K2 (L) : H2 (78.3%), and 8 biochemical variants. The majority of the strains possessed hemolytic properties. Strains of serological group O3 were isolated repeatedly from the patients during the sickness, whereas none were revealed in examination of 132 healthy children and adults. The data obtained permitted to consider these microbes to be possible causative agents of intestinal coliinfection, and to refer them to the enteropathogenic category.
作者研究了从49名患有急性肠道功能紊乱的儿童和成人中分离出的115株血清群03大肠杆菌的特性。大多数儿童（82.9%）年龄在一岁以下。对抗抗原结构和生化特性的研究结果使得能够将分离出的菌株分为3种血清型，其中O3 : K2 (L) : H2型菌株占多数（78.3%），还有8种生化变体。大多数菌株具有溶血特性。在患病期间，血清群O3的菌株在患者中被反复分离出来，而在对132名健康儿童和成人的检查中未发现此类菌株。所获得的数据使人们认为这些微生物可能是肠道大肠杆菌感染的病原体，并将它们归入肠道致病性类别。
