Molecular detection of sorbitol-fermenting Escherichia coli O157 in patients with hemolytic-uremic syndrome.
J Clin Microbiol
; 30(7): 1807-10, 1992 Jul.
Article
em En
| MEDLINE
| ID: mdl-1629338
ABSTRACT
Shiga-like toxin-producing Escherichia coli strains of serogroup O157 were identified in 26 of 104 patients with hemolytic-uremic syndrome and in 18 of 668 patients with diarrhea. All strains were identified by colony hybridization with DNA probes complementary to Shiga-like toxin I and Shiga-like toxin II gene sequences and characterized by biochemical tests and serotyping. Seventeen of these 44 patients had E. coli O157 strains which were unusual because they fermented sorbitol within 24 h of incubation and were positive for beta-glucuronidase activity. Culture filtrates of these sorbitol-fermenting strains were highly toxic to Vero cells in culture. Serological tests and DNA analysis performed by restriction endonuclease digestion of B-subunit toxin genes revealed that all 17 isolates produced Shiga-like toxin II. Although by using molecular probes we established a high frequency of sorbitol-fermenting E. coli O157 strains in the patients we examined, further studies on the prevalence of such isolates in other areas of endemic disease are clearly warranted.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Toxinas Bacterianas
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DNA Bacteriano
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Escherichia coli
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Síndrome Hemolítico-Urêmica
Tipo de estudo:
Diagnostic_studies
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Prevalence_studies
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Risk_factors_studies
Limite:
Adolescent
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Adult
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Aged
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Aged80
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Child
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Child, preschool
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Humans
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Infant
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Middle aged
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Newborn
Idioma:
En
Ano de publicação:
1992
Tipo de documento:
Article