Biochemical properties, enterohaemolysin production and plasmid carriage of Shiga toxin-producing Escherichia coli strains

Memórias do Instituto Oswaldo Cruz

Mario Rsm Souza²  Giseli Klassen²  Fabiana De Toni²  Liu U Rigo¹  Caroline Henkes²  Caroline P Pigatto¹  Cibelle De Borba Dalagassa²  Cyntia Mt Fadel-picheth² 

[1] ,Universidade Federal do Paraná Departamento de Patologia Médica Curitiba PR ,Brasil

关键词: Escherichia coli;    STEC;    plasmid profile;    enterohaemolysin;    biochemical properties;   

DOI  :  10.1590/S0074-02762010000300013

来源: SciELO

【 摘 要 】

Thirty-eight strains of Shiga toxin-producing Escherichia coli (STEC) were characterised in terms of biochemical properties, enterohaemolysin production and plasmid carriage. A wide variation in the biochemical properties was observed among the STEC, with 14 distinct biotypes identified. Biotype 1 was the most common, found in 29% of the strains. Enterohaemolysin production was detected in 29% of the strains. Most of the bacterial strains (95%) carried one or more plasmids and considerable heterogeneity in size and combinations was observed. Seven distinct plasmid profiles were identified. The most common profile, characterised by the presence of a single plasmid of ~90 kb, was found in 50% of these strains. These data indicate extensive diversity among STEC strains. No correlation was found among biotype, serotype, enterohaemolysin production and plasmid profile.

【 授权许可】

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