Abstract
We aimed to assess differences in bacterial intensities of Bacteroidetes phylum and different clostridial species in the human intestines with respect to C. difficile infection. Patients with a stool assay for C. difficile toxin were identified via the microbiology laboratory in our institute. Bacterial populations were quantified from stool samples of four groups of patients: Group I—patients with C. difficile associated diarrhea (CDAD); Group II—asymptomatic C. difficile carriers; Group III—patients with non-C. difficile diarrhea; Group IV—patients with no diarrhea and negative stool samples for the C. difficile toxin (control group). Stool was examined for three genes—C. difficile toxin A gene, 16S rRNA gene from Clostridium thermocellum representing other clostridial species, and 16S rRNA gene from Bacteroides fragilis representing the Bacteroidetes phylum. Fifty-nine patients underwent analysis of the stool (CDAD group 14, carriers group 14, non-C. difficile diarrhea group 16, control group 15). C. difficile concentration was highest in the CDAD group, followed by the carriers group. Higher concentrations of both clostridial species and Bacteriodetes were observed in the control and non-C. difficile diarrhea groups compared to the CDAD and carriers groups. We demonstrated an inverse association between infection with C. difficile and the abundance of Bacteroidetes phylum and other clostridial species in human intestines. Studies with larger samples and broader diagnostic procedures are needed in order to better explore and understand this association.
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The authors thank Prof. Yitzhak Haberfeld from the Department of Labor Studies, The Faculty of Social Sciences, Tel-Aviv University, Israel, for his assistance in statistical analysis.
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E. Goldberg and I. Amir contributed equally to this work.
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Goldberg, E., Amir, I., Zafran, M. et al. The correlation between Clostridium-difficile infection and human gut concentrations of Bacteroidetes phylum and clostridial species. Eur J Clin Microbiol Infect Dis 33, 377–383 (2014). https://doi.org/10.1007/s10096-013-1966-x
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DOI: https://doi.org/10.1007/s10096-013-1966-x