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- W4281618985 abstract "Cronobacter spp. is an opportunistic pathogen that causes severe infections, affecting newborns and infants, and is also an emerging cause of hospital-acquired infection in elderly populations. These infections are mainly associated with the consumption of infant formulas, even though these bacteria have been isolated from other foods as well. Cronobacter spp. invades epithelial cells and escapes the immune response mechanisms, multiplying inside macrophages. However, the pathogenesis and virulence factors of these bacteria have not been fully elucidated and need to be further studied. Therefore, this study aimed to evaluate the ability of Cronobacter spp. strains isolated from infant cereals to invade and survive within macrophages, investigate the virulence phenotype using the Galleria mellonella model, and identify possible genes involved in bacterial pathogenesis through pan-genome analysis. All the isolates were able to invade macrophages and the survival of bacteria decreased over a 72 h period, with bacterial cell counts reaching up to 106 CFU/ml. Cronobacter sakazakii isolate 112 exhibited a similar mortality rate (40-70%) to the ATCC BAA 894 strain (Cronobacter sakazakii) in G. mellonella assay. In addition, some unique virulence genes (isolate 7, ada_2, tcmA_1, acrB_3; isolate 78, ampC_2, rihC_1 and isolate 112, fimH, ylpA, gtrA) were identified within isolates with the invasive profile in the in vivo and in vitro assays. Furthermore, isolates from different species were grouped into seven distinct clusters in the pan-genome analysis. The most virulent isolates (7, 78, and 112) were grouped in distinct subclusters in the cladogram. This work revealed potential Cronobacter spp. pathogenic strains recovered from infant cereals." @default.
- W4281618985 created "2022-06-13" @default.
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- W4281618985 date "2022-09-01" @default.
- W4281618985 modified "2023-10-01" @default.
- W4281618985 title "Virulence and DNA sequence analysis of Cronobacter spp. isolated from infant cereals" @default.
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- W4281618985 doi "https://doi.org/10.1016/j.ijfoodmicro.2022.109745" @default.
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