The stool specimens of 235 patients with acute diarrhea were isolated and identifiedfor detection of ETEC,according to modified Elek test by purified anti-heat-labile entero-toxin serum and to the suckling mouse assay.Simultaneously,the other enteropathogenicorganisms were also isolated.33 strains of ETEC(14.04%)were obtained in total,amongwhich 29 strains(87.8%)belong to heat-stable enterotoxin(ST)type;3 strains(9.09%)heat-labile enterotoxin(LT)type and only 1 strain(3.1%)ST and LT mixed type.It wasshown that ETEC was one of the important enteric pathogens of patients with acute diar-rhea.The isolation,identification and incidence of ETEC were discussed briefly.