[Detection situation of an adhesion factor in diarrheagenic Escherichia coli]

Diarrhea caused by the Escherichia coli with held adhesion came to attention. We performed an adhesion-related gene and relation of diarrhea. Subjects were 77 outpatients with diarrhea from June 2003 to December 2005. A total of 102 E. coli strains randomly isolated from stool specimens. All the toxigenic examinations were negative, and there were not the relations. Adhesion-related gene were 10 strains found. As for the contents, astA was 5 strains, 2 strains of aggR, 2 strains of eaeA, 1 strain of eaeA plus astA. Of these, we were able to classify 5 strains in serological typing, but remain 5 strains did not typing. Only one strain of O157 was VT positive. There is not it with causative E. coli of diarrhea even if serological typing is negative. Therefore it was thought that an adhesion-related gene test was important.