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• W2065555275 abstract "Antibiotic therapy is a causative agent of severe disturbances in microbial communities. In healthy individuals, the gut microbiota prevents infection by harmful microorganisms through direct inhibition (releasing antimicrobial compounds), competition, or stimulation of the host’s immune defenses. However, widespread antibiotic use has resulted in short- and long-term shifts in the gut microbiota structure, leading to a loss in colonization resistance in some cases. Consequently, some patients develop Clostridium difficile infection (CDI) after taking an antibiotic (AB) and, at present, this opportunistic pathogen is one of the main causes of antibiotic-associated diarrhea in hospitalized patients. Here, we analyze the composition and functional differences in the gut microbiota of C. difficile infected (CDI) versus non-infected patients, both patient groups having been treated with AB therapy. To do so we used 16S rRNA gene and metagenomic 454-based pyrosequencing approaches. Samples were taken before, during and after AB treatment and were checked for the presence of the pathogen. We performed different analyses and comparisons between infected (CD+) versus non-infected (CD-) samples, allowing proposing putative candidate taxa and functions that might protect against C. difficile colonization. Most of these potentially protective taxa belonged to the Firmicutes phylum, mainly to the order Clostridiales, while some candidate protective functions were related to aromatic amino acid biosynthesis and stress response mechanisms. We also found that CDI patients showed, in general, lower diversity and richness than non-infected, as well as an overrepresentation of members of the families Bacteroidaceae, Enterococcaceae, Lactobacillaceae and Clostridium clusters XI and XIVa. Regarding metabolic functions, we detected higher abundance of genes involved in the transport and binding of carbohydrates, ions and others compounds as a response to an antibiotic environment." @default.
• W2065555275 created "2016-06-24" @default.
• W2065555275 creator A5004234488 @default.
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• W2065555275 date "2014-07-04" @default.
• W2065555275 modified "2023-10-02" @default.
• W2065555275 title "Structural and functional changes in the gut microbiota associated to Clostridium difficile infection" @default.
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• W2065555275 doi "https://doi.org/10.3389/fmicb.2014.00335" @default.
• W2065555275 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4163665" @default.
• W2065555275 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25309515" @default.
• W2065555275 hasPublicationYear "2014" @default.
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