Artículos de revistas
Distribution of additional virulence factors related to adhesion and toxicity in Shiga toxin-producing Escherichia coli isolated from raw products in Argentina
Fecha
2013-04Registro en:
Cadona, Jimena Soledad; Bustamante, Ana Victoria; Parma, Alberto Ernesto; Lucchesi, Paula Maria Alejandra; Sanso, Andrea Mariel; Distribution of additional virulence factors related to adhesion and toxicity in Shiga toxin-producing Escherichia coli isolated from raw products in Argentina; Wiley; Letters In Applied Microbiology; 56; 6; 4-2013; 449-455
0266-8254
Autor
Cadona, Jimena Soledad
Bustamante, Ana Victoria
Parma, Alberto Ernesto
Lucchesi, Paula Maria Alejandra
Sanso, Andrea Mariel
Resumen
A total of 73 Shiga toxin-producing Escherichia coli (STEC) isolates, belonging to 25 serotypes and isolated from raw products in Argentina, were examined for the occurrence of genes responsible for bacterial adhesions to intestine, ehaA (EHEC autotransporter), lpfAO113 (long polar fimbriae), sab (STEC autotransporter [AT] contributing to biofilm formation), ecpA (E. coli common pilus), hcpA (haemorrhagic coli pilus), elfA (E. coli laminin-binding fimbriae), sfpA (sorbitol-fermenting EHEC O157 fimbriae plasmid-encoded) and of the toxigenic gene cdt-V (cytolethal distending toxin). Our study showed different adhesin profiles that are not linked to one specific serotype and that all analysed isolates possess, besides stx genes, some adherence genes. Several of the isolates contained also multiple toxin genes. The results of the present work alert the presence of genes coding for additional adhesins and cdt-V toxin in LEE-negative STEC strains that occur in foods, and this traits could increase their pathogenic potential.