P. EcheverriaJ. SeriwatanaD. N. TaylorC. TirapatB. RoweMahidol University2018-10-122018-10-121985-11-20Infection and Immunity. Vol.48, No.3 (1985), 843-846001995672-s2.0-0021997002https://repository.li.mahidol.ac.th/handle/20.500.14594/30786Plasmid DNAs obtained from 18 escherichia coli isolates that hybridized with the heat-stable b (ST-b) enterotoxin gene probe were examined by Southern blot analysis for genes coding for heat-labile, ST-a, and ST-b enterotoxins with specific rabiolabeled DNA probes. Four E. coli isolates contained plasmids coding for both heat-labile and ST-b enterotoxins, and one isolate contained a plasmid coding for ST-a and ST-b. Five of 11 isolates of antibiotic-resistant enterotoxigenic E. coli isolates containing ST-b-coding DNA transferred a plasmid coding for both antibiotic resistance and ST-b to E. coli K-12, suggesting that the widespread use of antibiotics could increase the distribution of genes coding for ST-b.Mahidol UniversityImmunology and MicrobiologyArticleSCOPUS