[Characterization of the enterotoxigenic strains of Escherichia coli isolated from children with diarrhea in Popular Democratic Republic Lao].

Enterotoxigenic Escherichia coli (ETEC) of infant origin from the Popular Democratic Republic Lao were characterized with respect to there 0 serogroups, biotypes, anti-bioresistances, fimbrial antigens and types of enterotoxins produced. Enterotoxin production was determined by the suckling mice assay, competitive GM1-erythroassay, and cell cultures (CHOK1 and Y1). The presence of genes encoding for the enterotoxins was determined by colony hybridization by using radioactive DNA probes.