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- W1155239912 abstract "Different structures related to biofilm formation by Shiga toxin–producing Escherichia coli (STEC), particularly O157 strains, have been described, but there are few data regarding their involvement in non-O157 strains. The aim of this study was to determine the ability of 14 O157 and 8 non-O157 strains isolated from bovine hide and carcass to interact with biotic and abiotic surfaces and also to evaluate the role of different adhesins. Biofilm formation assays showed that four O157 and two non-O157 strains were able to adhere to glass, and that only one O157 strain adhered to polystyrene. Reverse transcriptase–polymerase chain reaction was carried out using biofilm-forming strains to determine the expression of antigen 43 (Ag43), curli, type 1 fimbriae, STEC autotransporter contributing to biofilm formation (Sab), calcium-binding antigen 43 homologue (Cah), and autotransporter protein of enterohemorrhagic E. coli (EhaA). Most of these structures were expressed under biofilm conditions. However, the lack of Ag43 in one non-O157 strain, as well as Cah and EhaA in two O157 strains, suggests that other adhesins are involved in biofilm formation in these strains. Despite the fact that adherence to HeLa cells was detected in 20 strains (91%), it was not possible to correlate biofilm formation with adherence patterns. Invasiveness in T84 and Caco-2 cells was observed in four and three O157 strains, respectively. Altogether, we showed that there are different sets of genes involved in the interactions of STEC with biotic and abiotic surfaces. Interestingly, one O157 strain that was able to form biofilm on both glass and polystyrene also adhered to and invaded human cells, indicating an important route for its persistence in the environment and interaction with the host. Additionally, the ability of non-O157 strains not carrying the LEE pathogenicity island to form biofilm highlights an industrial and health problem that cannot be neglected." @default.
- W1155239912 created "2016-06-24" @default.
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- W1155239912 date "2014-03-01" @default.
- W1155239912 modified "2023-10-01" @default.
- W1155239912 title "Interactions of O157 and Non-O157 Shiga Toxin–ProducingEscherichia coli(STEC) Recovered from Bovine Hide and Carcass with Human Cells and Abiotic Surfaces" @default.
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- W1155239912 doi "https://doi.org/10.1089/fpd.2013.1653" @default.
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