Enteropathogenicity markers in Escherichia coli strains isolated from soft white cheese and poultry in Rio de Janeiro, Brazil

Analysis of virulence genes in Escherichia coli isolated from grated cheese

“…The low prevalence of pathogenic E. coli in cheese, in spite of the large contamination by faecal coliforms, has been previously stated (PANETO et al, 2007;GONZALEZ et al, 2000); it was suggested that pathogenic E. coli could have been present as a small fraction of the coliform population and could have been overgrown by other strains (CONEDERA et al, 2004). This statement might explain the low percentage of strains carriers of virulence genes observed in this work.…”

“…Virulent EPEC often exhibit a typical adherence phenotype to epithelial cells (localized adherence -LA) and induce attaching-effacing (A/E) lesions on gut enterocytes. The virulence genes eaf and eae are associated with these features (GONZALEZ et al, 2000). Shiga toxin-producing E. coli strains (STEC) are defined by the production of Shiga toxin (Stx) or possession of the Stx encoding gene subtype stx1 and stx2, or both stx1 and stx2.…”

Occurrence of Staphylococcus and enteropathogens in soft cheese commercialized in the city of Rio de Janeiro, Brazil

“…Despite this, our findings suggested the possibility of faecal contamination of pasteurized milk used for cheese production by an inefficient heat treatment applied or unsanitary conditions during cheese manufacturing (Freitas et al . 1993; Gonzalez et al . 2000).…”

Molecular characterization and evaluation of antimicrobial susceptibility of enteropathogenic E. coli (EPEC) isolated from minas soft cheese

“…Even though, improvements regarding food security have been observed since then, EPEC has been isolated from this kind of cheese, as confirmed by the present study. Preliminary data were reported by Gonzalez et al (2000), Araújo et al (2002) and Schrade and Yager (2001) and others.…”