PMID- 7007526 OWN - NLM STAT- MEDLINE DCOM- 19810424 LR - 20190511 IS - 0022-1899 (Print) IS - 0022-1899 (Linking) VI - 142 IP - 6 DP - 1980 Dec TI - Detection of enterotoxigenic Escherichia coli by DNA colony hybridization. PG - 892-8 AB - A method fo detecting large numbers of isolates of enterotoxigenic Escherichia coli is described in which the genes encoding th enterotoxins are detected, rather than the toxins themselves. Radiolabeled fragments of DNA encoding the heat-labile (LT) or heat-stable (ST) toxins were used as hybridization probes for homologous DNA sequences in E. coli colonies grown and lysed in situ on nitrocellulose filters. The LT probe detected all of 31 E. coli strains producing ST and LT or only LT, while the ST probe detected 12 of 17 strains producing only ST and three of 26 strains producing ST and LT. These results suggest that the LTs produced by different isolates of E. coli are homologous and that human isolates of E. coli produce at least two heterologous STs detectable in the infant mouse assay. The hybridization method also detected the presence of enterotoxigenic E. coli in bacterial growth in directly spotted stools from patients with acute diarrhea. FAU - Moseley, S L AU - Moseley SL FAU - Huq, I AU - Huq I FAU - Alim, A R AU - Alim AR FAU - So, M AU - So M FAU - Samadpour-Motalebi, M AU - Samadpour-Motalebi M FAU - Falkow, S AU - Falkow S LA - eng GR - AI 07149-02/AI/NIAID NIH HHS/United States GR - AI 10885-08/AI/NIAID NIH HHS/United States GR - DADA 17-72-C2149/DA/NIDA NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Infect Dis JT - The Journal of infectious diseases JID - 0413675 RN - 0 (DNA, Bacterial) RN - 0 (Enterotoxins) SB - IM MH - Acute Disease MH - DNA, Bacterial/*genetics MH - Diarrhea/microbiology MH - Enterotoxins/*genetics MH - Escherichia coli/*genetics MH - Escherichia coli Infections/microbiology MH - Genetic Code MH - Humans MH - *Hybridization, Genetic EDAT- 1980/12/01 00:00 MHDA- 1980/12/01 00:01 CRDT- 1980/12/01 00:00 PHST- 1980/12/01 00:00 [pubmed] PHST- 1980/12/01 00:01 [medline] PHST- 1980/12/01 00:00 [entrez] AID - 10.1093/infdis/142.6.892 [doi] PST - ppublish SO - J Infect Dis. 1980 Dec;142(6):892-8. doi: 10.1093/infdis/142.6.892.