Literature DB >> 29039846

Gut bacterial communities of diarrheic patients with indications of Clostridioides difficile infection.

Dominik Schneider1, Andrea Thürmer1, Kathleen Gollnow1, Raimond Lugert2, Katrin Gunka2, Uwe Groß2, Rolf Daniel1.   

Abstract

We present bacterial 16S rRNA gene datasets derived from stool samples of 44 patients with diarrhea indicative of a Clostridioides difficile infection. For 20 of these patients, C. difficile infection was confirmed by clinical evidence. Stool samples from patients originating from Germany, Ghana, and Indonesia were taken and subjected to DNA isolation. DNA isolations of stool samples from 35 asymptomatic control individuals were performed. The bacterial community structure was assessed by 16S rRNA gene analysis (V3-V4 region). Metadata from patients and control individuals include gender, age, country, presence of diarrhea, concomitant diseases, and results of microbiological tests to diagnose C. difficile presence. We provide initial data analysis and a dataset overview. After processing of paired-end sequencing data, reads were merged, quality-filtered, primer sequences removed, reads truncated to 400 bp and dereplicated. Singletons were removed and sequences were sorted by cluster size, clustered at 97% sequence similarity and chimeric sequences were discarded. Taxonomy to each operational taxonomic unit was assigned by BLASTn searches against Silva database 123.1 and a table was constructed.

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Mesh:

Year:  2017        PMID: 29039846      PMCID: PMC5644368          DOI: 10.1038/sdata.2017.152

Source DB:  PubMed          Journal:  Sci Data        ISSN: 2052-4463            Impact factor:   6.444


Background & Summary

Infections with Clostridioides difficile (formerly Clostridium difficile, see Lawson et al.[1]) have significantly increased over the past decade[2-5]. The organism is a Gram-positive, obligate anaerobic spore-forming bacterium, which is frequently found as member of the gut microbiome in healthy individuals, but eventually can also act as human pathogen causing disease that ranges from severe diarrhea to life-threatening toxic megacolon[6]. It produces two potent exotoxins, toxin A (enterotoxin, tcdA) and toxin B (cytotoxin, tcdB)[7]. Some isolates also express a third, so-called binary toxin (C. difficile transferase, CDT)[8]. The risk to suffer from a C. difficile infection increases with prior broad-spectrum antibiotic treatment, which supports the assumption that an imbalanced gut microbiome increases the likelihood of a C. difficile infection[9]. In this data report, we provide the bacterial community composition in stool samples of 79 human individuals including 44 patients with diarrhea indicative for infection with C. difficile and 35 asymptomatic control individuals from regions of Germany (Seesen, Lower Saxony), Ghana (Eikwe, Western Region), and Indonesia (Medan, Sumatra)., For 20 of the 44 patients, clinical evidence of a C. difficile infection was obtained. For the remaining patients, the presence of C. difficile was indicated by 16S rRNA gene data or MALDI-TOF mass spectrometry. In total, we provide 20,844,594 paired-end 16S rRNA gene reads sequenced with the v3 chemistry of Illumina and a MiSeq instrument. Correspondingly, this dataset represents a total of 10,422,297 bacterial 16S rRNA gene sequences. After all processing steps, which included read-merging, quality-filtering, primer sequence removal, dereplication, singleton removal, read-trimming, chimera removal, and removal of extrinsic domains (Archaea, chloroplasts) 7.204.189 (69.1%) high quality 16S rRNA gene sequences remained for analysis (see Table 1 (available online only) for 16S rRNA gene sequence processing statistics). Additionally, we supply metadata including gender, age, country, presence or absence of diarrhea, C. difficile ribotype, toxin PCR ribotype, toxin test from stool, concomitant diseases at time of sampling, and antiobiotic treatment within the last three months (Table 2 (available online only)).
Table 1

16S rRNA gene sequence processing statistics and biosample accession numbers

Sample nameBiosample accessionRaw reads (2x, paired-end)After PEAR% loss*After QF% loss *After taxonomy filter% loss *
patient_001SAMN06011251183,885178,2583.06128,09730.391,56250.2
patient_002SAMN06011252283,254272,3313.86208,96526.2189,87133.0
patient_003SAMN0601125329,31328,3723.2124,52816.323,85718.6
patient_004SAMN0601125419,85418,9674.4716,18518.514,88925.0
patient_005SAMN0601125577,41873,9604.4760,09722.456,67526.8
patient_006SAMN06011256118,110112,8294.4792,53521.773,60137.7
patient_007SAMN0601125761,76057,1077.5346,34825.044,38528.1
patient_008SAMN06011258188,584183,1212.90160,48914.9151,30219.8
patient_009SAMN06011259121,488116,3734.2176,06237.472,35340.4
patient_010SAMN0601126047,75445,8264.0438,38619.636,31224.0
patient_011SAMN060112611,137,3841,099,4803.33921,08719.0856,36424.7
patient_012SAMN0601126229,60128,3534.2223,89319.320,82429.7
patient_013SAMN06011263603,255575,7954.55470,89421.9419,48030.5
patient_014SAMN0601126427,89026,9063.5322,66418.721,30623.6
patient_015SAMN0601126587,99585,7172.5972,64917.467,57223.2
patient_016SAMN0601126681,37477,8714.3065,93419.056,60230.4
patient_017SAMN0601126739,76237,9694.5131,48120.828,62328.0
patient_018SAMN0601126869,26266,7303.6625,19563.623,39966.2
patient_019SAMN0601126983,42480,8393.1067,25919.463,69723.6
patient_020SAMN06011270108,817104,5973.8889,08118.185,92821.0
patient_021SAMN06011271123,228118,8153.58101,48517.697,88820.6
patient_022SAMN0601127227,39826,5203.2021,81820.419,52328.7
patient_023SAMN06011273782,019752,4763.78635,82318.7605,20822.6
patient_024SAMN06011274570,482548,0373.93466,96218.1450,55021.0
patient_025SAMN0601127529,42028,2523.9723,62619.722,38023.9
patient_026SAMN0601127658,09055,6214.2526,39054.624,95257.0
patient_027SAMN0601127729,43228,1094.5022,53923.420,81229.3
patient_028SAMN06011278181,138173,8034.05140,60822.4126,71430.0
patient_029SAMN0601127941,79640,5433.0035,36715.433,44420.0
patient_030SAMN0601128045,34543,7483.5230,55432.628,36437.4
patient_031SAMN0601128148,74547,5452.4613,51772.312,56974.2
patient_032SAMN0601128250,65548,0395.1621,79757.020,24860.0
patient_033SAMN06011283109,639105,7113.5875,17431.461,09844.3
patient_034SAMN0601128419,44918,8063.3116,05317.514,55825.1
patient_035SAMN0601128545,50243,8833.5636,31120.231,23131.4
patient_036SAMN06011286112,545107,6874.3280,57728.478,58230.2
patient_037SAMN0601128726,91725,4545.4420,43524.119,49427.6
patient_038SAMN0601128843,59742,5152.4834,86820.033,54023.1
patient_039SAMN06011289117,718114,5122.7297,78816.939,04366.8
patient_040SAMN0601129073,90569,6185.8054,94325.752,71728.7
patient_041SAMN0601129140,73039,3013.5132,68819.731,37123.0
patient_042SAMN0601129238,40937,1553.2631,74817.329,96222.0
patient_043SAMN0601129313,34613,0072.5411,38114.710,65020.2
patient_044SAMN0601129416,59215,9953.6013,58618.113,20720.4
patient_045SAMN0601129577,48874,5263.8262,02720.057,39625.9
patient_046SAMN0601129666,52764,4433.1351,99721.850,86123.5
patient_047SAMN06011297131,863129,0342.15110,88815.9104,20921.0
patient_048SAMN0601129827,78227,2142.0422,38319.422,10320.4
patient_049SAMN0601129918,33817,7743.0814,60320.413,97823.8
patient_050SAMN0601130047,40846,2522.4439,41216.936,08623.9
patient_051SAMN06011301120,937117,8982.51102,90414.995,66720.9
patient_052SAMN0601130259,28257,5272.9649,67716.247,37720.1
patient_053SAMN0601130378,97477,5341.8267,32014.862,53920.8
patient_054SAMN0601130435,54334,3853.2628,94718.624,64630.7
patient_055SAMN0601130595,17992,6202.6975,46320.770,81825.6
patient_056SAMN0601130627,16826,4252.7322,55117.021,33821.5
patient_057SAMN0601130774,44572,2312.9762,59915.960,43918.8
patient_058SAMN06011308329,680317,3123.75268,82018.5257,89621.8
patient_059SAMN0601130921,03320,2663.6516,77920.215,70625.3
patient_060SAMN06011310432,732421,2772.65352,20118.6336,71122.2
patient_061SAMN0601131124,32023,4793.4618,99321.918,22425.1
patient_062SAMN0601131238,55835,9816.6828,86825.127,28329.2
patient_063SAMN0601131356,15651,6068.1041,66325.838,64731.2
patient_064SAMN0601131446,73244,7804.1834,61725.933,39928.5
patient_065SAMN0601131566,68564,4463.3652,33721.544,96832.6
patient_066SAMN06011316133,075128,6153.35100,31724.698,06926.3
patient_067SAMN06011317172,365166,7233.27142,93217.1137,22620.4
patient_068SAMN0601131870,14068,5352.2959,16915.655,80220.4
patient_069SAMN0601131938,00737,0562.5030,10720.829,57722.2
patient_070SAMN0601132013,53013,1262.9911,14317.610,44322.8
patient_071SAMN06011321163,830155,2755.22126,20723.0118,94027.4
patient_072SAMN0601132282,48879,1514.0564,79621.459,57627.8
patient_073SAMN060113231,421,9671,376,5143.201,126,24920.8676,49752.4
patient_074SAMN06011324122,784117,6094.2196,11621.786,40029.6
patient_075SAMN0601132518,84818,2183.3414,94520.714,16124.9
patient_076SAMN0601132634,77133,6883.1127,87519.826,13224.8
patient_077SAMN0601132769,09266,5203.7255,76919.350,12127.5
patient_078SAMN06011328113,883111,1352.4198,30513.792,50318.8
patient_079SAMN0601132944,40642,3654.6034,01223.431,74428.5

*calculated from raw reads.

Table 2

Metadata of patients

Sample nameC. difficile cultureRibotypeToxin PCR RibotypeToxin from stool (GDH)C. difficile detection by NGSConformity of C. difficile detectionCountryGenderAge (y)diarrheaConcomitant diseasesAntibiotics last three months
patient_001positive27A+B+CDT+positivepositivetrueGermanymale75yesnoneyes
patient_002positive001/072A+B+CDT−positivepositivetrueGermanyfemale79yesnoneno
patient_003negativeNANANAnegativetrueGermanymale87yesnoneyes
patient_004negativeNANANApositivefalseGermanyfemale93yesnoneyes
patient_005negativeNANANAnegativetrueGermanymale75yesnoneyes
patient_006negativeNANANApositivefalseGermanyfemale62nononeno
patient_007negativeNANANAnegativetrueGermanymale49nononeyes
patient_008negativeNANANAnegativetrueGermanymale69yesnoneno
patient_009positive001/072A+B+CDT−negativepositivetrueGermanymale77yesnoneyes
patient_010negativeNANANApositivefalseGermanyfemale63yesnoneno
patient_011negativeNANANAnegativetrueGermanyfemale64yesnoneno
patient_012negativeNANANApositivefalseGermanyfemale75nononeno
patient_013negativeNANANApositivefalseGermanyfemale75nononeno
patient_014negativeNANANApositivefalseGermanyfemale65nononeno
patient_015negativeNANANAnegativetrueGermanymale71nononeyes
patient_016negativeNANANApositivefalseGermanymale79nononeno
patient_017negativeNANANApositivefalseGermanymale56nononeno
patient_018positive001/072A+B+CDT−negativepositivetrueGermanymale77yesnoro virusyes
patient_019negativeNANANApositivefalseGermanyfemale31nononeno
patient_020positive78A+B+CDT+negativepositivetrueGermanymale57yesnoro virusyes
patient_021negativeNANANApositivefalseGermanymale85yesnoneyes
patient_022negativeNANANApositivefalseGermanymale84nononeyes
patient_023positive78A+B+CDT+negativepositivetrueGermanymale57yesnoro virusyes
patient_024negativeNANANAnegativetrueGermanymale80yesnoro virusyes
patient_025positive78A+B+CDT+negativepositivetrueGermanymale59yesnoneyes
patient_026positive001/072A+B+CDT−negativepositivetrueGermanymale82yesnoneyes
patient_027negativeNANANApositivefalseGermanyfemale81nononeNA
patient_028negativeNANANAnegativetrueGermanyfemale72yesnoneyes
patient_029positive2A+B+CDT−positivepositivetrueGermanymale91yesnoneyes
patient_030positive001/072A+B+CDT−positivepositivetrueGermanyfemale84yesnoneyes
patient_031positive78A+B+CDT+negativenegativetrueGermanyfemale85yesnoro virusyes
patient_032positive2A+B+CDT−negativepositivetrueGermanyfemale70yesnoneyes
patient_033positive001/072A+B+CDT−negativepositivetrueGermanymale73yesnoneyes
patient_034negativeNANANApositivefalseGhanamale45nononeAmoxicillin
patient_035negativeNANANAnegativetrueGhanamale47yessuspected cholerano
patient_036negativeNANANAnegativetrueGhanamale9noacute abdomen (suspected typhoid)no
patient_037positiveSLO 233A+B+CDT−positivepositivetrueGhanafemale1.17noETEC/LTCloxacillin
patient_038positive084 (CE)A−B−CDT−negativepositivetrueGhanafemale2noETEC/LTAmoxicillin
patient_039positiveSLO 095A−B−CDT−negativepositivetrueGhanamale72nononeno
patient_040positive011/049A−B−CDT−negativepositivetrueGhanafemale30noacute abdomenno
patient_041positiveSLO091A−B−CDT−negativepositivetrueGhanamale1.17yesmalaria, rota virus, ETEC/LTno
patient_042positive097 (CE)A−B−CDT−negativenegativetrueGhanafemale24nononeMetronidazole, Ciprofloxacin
patient_043positive084 (CE)A−B−CDT−negativepositivetrueGhanamale5noGiardiano
patient_044positiveSLO 235A−B−CDT−negativenegativetrueGhanafemale0.67noShigellano
patient_045negativeNANANApositivefalseGhanafemale34yesnoneno
patient_046negativeNANANAnegativetrueGhanafemale1.42yesmalaria, chest infectionno
patient_047negativeNANANApositivefalseGhanamale44yesnoneno
patient_048negativeNANANApositivefalseGhanafemale56yeschest infectionAmoxicillin in the last 6 months
patient_049negativeNANANApositivefalseGhanamale84yesnoneMetronidazole, Ampicillin
patient_050negativeNANANApositivefalseGhanamale52nononeMetronidazole in the last 6 months
patient_051negativeNANANAnegativetrueGhanamale78nononeno
patient_052negativeNANANAnegativetrueGhanafemale41nononeno
patient_053negativeNANANApositivefalseGhanafemale28nononeno
patient_054negativeNANANAnegativetrueGhanafemale72nononeno
patient_055positiveSLO 233A+B+CDT−positivepositivetrueGhanafemale22yesCampylobacterno
patient_056positive084 (CE)A−B−CDT−negativepositivetrueGhanafemale40yesnoneMetronidazole
patient_057positive084 (CE)A−B−CDT−negativenegativetrueGhanafemale1.33yesmalaria, Campylobacterno
patient_058negativeNANANApositivefalseIndonesiamale3nononeno
patient_059negativeNANANApositivefalseIndonesiamale13nononeno
patient_060negativeNANANApositivefalseIndonesiamale65nononeno
patient_061negativeNANANAnegativetrueIndonesiamale12yesnoneno
patient_062negativeNANANAnegativetrueIndonesiafemale3yesnoneno
patient_063negativeNANANAnegativetrueIndonesiafemale20yesnoneno
patient_064positive17A−B+CDT−negativepositivetrueIndonesiafemale56yesnoneno
patient_065negativeNANANApositivefalseIndonesiamale1yesnoneno
patient_066negativeNANANAnegativetrueIndonesiafemale70yesnoneno
patient_067negativeNANANAnegativetrueIndonesiafemale26yesnoneno
patient_068negativeNANANApositivefalseIndonesiamale46yesnoneno
patient_069negativeNANANApositivefalseIndonesiafemale53yesnoneno
patient_070positive53A+B+CDT−negativepositivetrueIndonesiamale44nononeno
patient_071positiveSLO 236A+B+CDT−positivepositivetrueIndonesiafemale0.75nononeno
patient_072positiveSLO 160A+B+CDT−negativepositivetrueIndonesiafemale10yesnoneno
patient_073positive10A−B−CDT−negativepositivetrueIndonesiamale0.16yesnoneno
patient_074negativeNANANApositivefalseIndonesiafemale11nononeno
patient_075negativeNANANApositivefalseIndonesiamale100nononeno
patient_076negativeNANANApositivefalseIndonesiafemale85nononeno
patient_077negativeNANANApositivefalseIndonesiamale67yesnoneno
patient_078negativeNANANApositivefalseIndonesiafemale41nononeno
patient_079negativeNANANApositivefalseIndonesiafemale49nononeno
The dataset contributes to unveil the significance of the gut microbiome in diseased and asymptomatic patients. In a first analysis, we observed C. difficile as a rather low abundant (mainly <1%, with one exception) bacterial community member in stool samples (Fig. 1). The exception was patient_029 (male, age 91), who showed a high abundance of C. difficile (42.67%).
Figure 1

Bacterial community composition at family level of human stool samples analysed in this study.

The bacterial community profiles are based on operational taxonomic unit (OTU, defined at 97% genetic identity) frequency in stool samples of 44 patients with diarrhea indicative of C. difficile infection and 35 asymptomatic control individuals (n=79). One stool sample per patient was used and amplicon PCRs were performed in triplicate for this analysis. Families, which exhibited an abundance of lower than 1% in the entire dataset, were summarized as rare taxa. Relative abundance of C. difficile (Peptoclostridium difficile in SILVA database 123.1) is displayed separately and exhibited highest similarity to Clostridioides difficile strain 630 delta erm (Accession number CP016318). Occurrence of diarrhea in patents is indicated by plus (patient exhibited diarrhea) and minus (no diarrhea), results from microbiological diagnosis of C. difficile infection (C. d. m. t.) are shown below (plus, positively tested for C. difficile; minus, negatively tested for C. difficile). Presence and absence of C. difficile in amplicon data (C. d. NGS) are indicated by plus (present) and minus (absent). Data processing and employed tools are described in detail in the methods section.

Whether the low abundance of C. difficile in most stool samples from diarrheic patients might indicate adhesion or invasion of C. difficile to the intestinal epithelium remains to be analyzed. However, a similar study also observed low abundances of C. difficile in CDI patients[10]. Furthermore, C. difficile is not the only potential pathogen of diseased patients. The stool samples of some patients contain other potentially pathogenic bacterial species belonging to different genera such as Escherichia/Shigella, Salmonella or Staphylococcus. In addition, some stool samples also contained facultative human-pathogenic Klebsiella and Pseudomonas species. These results support the hypothesis that the gut microbiome contributes to the pathogenic potential or at least can be used as an indicator of C. difficile infections. This is of special interest for C. difficile infections from Ghana, as most of the so far analyzed genomes of strains from this African country lack the toxin genes[11]. Furthermore, most German patients had a higher age than the patients from the other regions and showed a typical C. difficile infection profile, including treatment with antibiotics and presence of mainly toxin-positive strains. In contrast patients from Ghana and Indonesia were younger and had less antibiotic treatment than the German patients, and harboured predominantly toxin-negative strains (Table 2 (available online only)). The Unifrac[12] based bacterial community structure comparison shows variations in structure and diversity within potentially C. difficile-infected and reference patients (Fig. 2). We observed a low but significant correlation of the bacterial microbiome to patients who exhibited diarrhea (P=0.006, r2=0.0709) and diagnosed C. difficile positive by microbiological tests (P=0.017, r2=0.0628), respectively. In general, patients that have been diagnosed C. difficile positive harbour a less diverse bacterial microbiome (Fig. 2), which has also been observed recently[13,14].
Figure 2

Multivariate analysis of the bacterial community from human stool samples.

Non-metric multidimensional scaling (NMDS) based on weighted Unifrac[12] was used to display the bacterial community structure in 79 stool samples at same sequencing effort (10.000 reads per sample). Samples from patients who exhibited diarrhea at time of sampling are encased by diamond. Samples from patients that were positively tested on C. difficile by microbiological test are marked by plus, samples of patients where C. difficile was detected in the amplicon dataset are marked by cross. Point size represents the phylogenetic diversity (PD, Faith's Phylogenetic Diversity[26]) of the microbiome, samples are encircled by PD ranges from 0–10, 10–15, 15–20, and 20–30. Data processing and employed tools are described in detail in the methods section. All alpha diversity metrics obtained by QIIME are listed in Table 3 (available online only).

Methods

Stool sample preparation and processing

This study was approved by the Ethical Committee of the University Medical Center, Göttingen, Germany (2011-03-29). Diarrhea was defined as the passage of ≥three loose or liquid defecations per day. Upon informed consent, randomly selected patients with diarrhea and non-diarrheal volunteers agreed to submit a stool sample using stool containers and complete a standardised questionnaire about their lifestyle and medical history. Within two hours after providing the stool samples, they were cultured on Clostridium difficile agar base used with selective supplement (Oxoid, Basingstoke, Hampshire, UK) and 7% (v/v) defibrinated human blood for 48 h at 38 °C in anaerobic condition using gas packs (bioMérieux, Marcy-l’Ètoile, France). Stool samples were also tested for the presence of C. difficile glutamate dehydrogenase (GDH) antigen and toxins A and B by the C. DIFF QUIK CHEK COMPLETE test (Techlab, Blacksburg, USA). In addition, the stool sample that was used for C. difficile identification was also frozen immediately after taken from the patients, stored at −20 °C for a maximum of 11 months (based on duration of local sampling period) and transported within 24 h to Göttingen (Germany), where identification of C. difficile was confirmed by recultivation and MALDI-TOF mass spectrometry using Biotyper (Bruker Daltonics, Bremen, Germany) with score values of ≥2,000. All C. difficile strains were further characterized by toxin determination using the RealStar Clostridium difficile PCR Kit 1.0 (Altona Diagnostics, Hamburg, Germany). Ribotyping and toxinotyping was kindly performed by L. von Müller (Homburg, Germany) and M. Rupnik (Maribor, Slovenia) as previously be reported[11]. In addition, the Luminex xTag GPP test was used for all Ghanaian stool samples according to the manufacturer’s instructions (Luminex, Hertogenbosch, The Netherlands) in order to identify C. difficile and other potential intestinal pathogens[11]. The stool sample was also used for DNA isolation in order to determine bacterial community composition.

Nucleic acid extraction and amplification of 16S rRNA genes

DNA was extracted from all stool samples using the MagNA Pure LC 2.0 Instrument with the MagNA Pure LC Total Nucleic Acid Isolation kit following the instructions of the manufacturer (Roche, Mannheim, Germany). Bacterial 16S rRNA gene amplicons were generated using fusion primers TCGTCGGCAGCGTCAGATGTGTATAAGAGACAG-CCTACGGGNGGCWGCAG (MiSeq_overhang-D-Bact-0341-b-S-17) and GTCTCGTGGGCTCGGAGATGTGTATAAGAGACAG-GACTACHVGGGTATCTAATCC (MiSeq_overhang-S-D-Bact-0785-a-A-21) including bacteria targeting primers from Klindworth et al.[15]. The PCR reaction mixture with a total volume 50 μl contained 1 U Phusion high fidelity DNA polymerase (Biozym Scientific, Oldendorf, Germany), 5% DMSO, 0.2 mM of each primer, 200 μM dNTP, 0.2 μl of 50 mM MgCl2, and 25 ng of isolated DNA. Thermal cycling scheme for bacterial amplicons was as follows: initial denaturation for 1 min at 98 °C, 25 cycles at 98 °C for 45 s, 45 s at 60 °C, and 30 s at 72 °C, and a final extension at 72 °C for 5 min. The resulting PCR products were checked by agarose gel electrophoresis for appropriate size and purified using the magnetic bead capture kit NucleoMag PCR (Macherey-Nagel, Düren, Germany) as recommended by the manufacturer. Quantification of the PCR products was performed using the Quant-iT dsDNA HS assay kit and a Qubit fluorometer (Invitrogen GmbH, Karlsruhe, Germany) following the manufacturer’s instructions. PCR products were used to attach indices and Illumina sequencing adapters using the Nextera XT Index kit (Illumina, San Diego). Index PCR was performed using 5 μl of template PCR product, 2.5 μl of each index primer, 12.5 μl of 2x KAPA HiFi HotStart ReadyMix and 2.5 μl PCR grade water. Thermal cycling scheme was as follows: 95 °C for 3 min, 8 cycles of 30 s at 95 °C, 30 s at 55 °C and 30 s at 72 °C and a final extension at 72 °C for 5 min. Bacterial 16S rRNA genes were sequenced using the dual index paired-end (v3, 2×300 bp) approach for the Illumina MiSeq platform as recommended by the manufacturer.

16S rRNA gene sequence processing and analyses

Demultiplexing and clipping of sequence adapters from raw sequences were performed by employing CASAVA data analysis software (Illumina). Paired-end sequences were merged using PEAR v0.9.10[16] with default parameters. Subsequently, sequences with an average quality score lower than 20 and containing unresolved bases were removed with the split_libraries_fastq.py script from QIIME 1.9.1[17]. We additionally removed non-clipped reverse and forward primer sequences by employing cutadapt 1.10[18] with default settings. For operational taxonomic unit (OTU) clustering, we used USEARCH version 8.1.1861[19] with the UPARSE[20] algorithm to truncate reads to 400 bp (-fastx_truncate), dereplicate (-derep_fulllength), sort by cluster size and remove singletons (-sortbysize). Subsequently, OTUs were clustered at 97% sequence identity using USEARCH (-cluster_otus), which includes de novo chimera removal. Additionally, chimeric sequences were removed using UCHIME[21] included in software package USEARCH with reference mode (-uchime_ref) against RDPs trainset15_092015.fasta[22]. All quality-filtered sequences were mapped to chimera-free OTUs and an OTU table was created using USEARCH (-usearch_global). Taxonomic classification of the picked reference sequences (OTUs) was performed with parallel_assign_taxonomy_blast.py against SILVA SSU database release 123.1[23]. Extrinsic domain OTUs, chloroplasts, and unclassified OTUs were removed from the dataset by employing filter_otu_table.py. Sample comparisons were performed at the same surveying effort, utilizing the lowest number of sequences by random resampling (10.000 reads per sample). Species richness, alpha and beta diversity estimates were determined using the QIIME script alpha_rarefaction.py. Non-metric multidimensional scaling (NMDS) and statistical tests were performed with the vegan package[24] in R[25].

Data Records

The paired-end reads of the 16S rRNA gene sequencing were deposited in the National Center for Biotechnology Information (Data Citation 1). The dataset consists of 158 zipped FASTQ files that were processed by the CASAVA software (Illumina), which includes demultiplexing and removal of adapter sequences. The OTU table (otu_table_PRJNA353065.xlsx) used for all analyses and the corresponding representative OTU sequences clustered at 97% genetic identity (otu_sequences_PRJNA353065.fasta) are accessible at figshare.com (Data Citation 2).

Technical Validation

Success of 16S rRNA gene amplicon generation was controlled by reviewing the amplicon size (approximately 550 bp) and absence of contaminations on an agarose gel. Additionally, negative (PCR reaction without template) and positive controls (genomic DNA of E. coli DH5a) were performed to ensure purity of the employed reagents. To reduce possible PCR biases, all PCRs were performed in triplicate and after purification pooled equimolar.

Usage Notes

The OTU table (otu_table_PRJNA353065.xlsx) used for all analyses and the corresponding representative OTU sequences clustered at 97% genetic identity (otu_sequences_PRJNA353065.fasta) are accessible at figshare (Data Citation 2).

Additional Information

How to cite this article: Schneider, D. et al. Gut bacterial communities of diarrheic patients with indications of Clostridioides difficile infection. Sci. Data 4:170152 doi: 10.1038/sdata.2017.152 (2017). Publisher’s note: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Table 3

Diversity metrics for each bacterial microbiome at a sequence depth of 10.000 16S rRNA gene reads

Sample namePD_whole_treeberger_parker_dbrillouin_dchao1chao1_lower_boundchao1_upper_bounddominancedoublesenspieequitabilityesty_lower_boundesty_upper_boundfisher_alphagini_indexgoods_coverageheip_emargalefmcintosh_dmcintosh_emenhinickmichaelis_menten_fitobservedobserved_otusobserved_speciesrobbinsshannonsimpsonsimpson_esimpson_reciprocalsinglesstrong
patient_0014.1610.8350.80747.74937.72989.1660.7023.51.4250.2300.0024.4630.9980.9990.0383.6260.1640.840.34436.03634.434.434.40.0011.1730.2980.0421.4259.70.824
patient_00216.1470.1843.472299.526268.222358.7240.06429.915.7350.6450.0040.00942.6710.9760.9940.1425.1890.7550.2582.33261.9282332332330.0065.0690.9360.06815.73563.60.739
patient_0034.4480.9880.08659.04633.798149.0660.9762.71.0240.0280.0010.0022.9420.9980.9980.0042.4860.0120.990.23938.57623.923.923.90.0020.1290.0240.0431.02415.10.946
patient_00410.4540.5622.185152.063135.923192.8640.32813.83.0470.4570.0010.00420.1860.9890.9970.06513.4960.4310.581.253133.141125.3125.3125.30.0033.1870.6720.0243.04727.80.744
patient_00510.4830.3832.476160.903137.006216.2380.18614.95.3690.5230.0020.00518.9310.990.9960.09512.7790.5740.4371.187132.337118.7118.7118.70.0043.6040.8140.0455.36935.30.765
patient_00614.410.3523.016229.708206.752278.4190.14521.46.9210.5840.0030.00632.4810.9810.9960.10920.1080.6260.3871.862202.688186.2186.2186.20.0044.4020.8550.0376.92144.20.731
patient_00710.5890.5091.739164.959139.239222.3620.334172.9930.3690.0020.00618.8540.9940.9960.04112.7360.4260.5851.183138.591118.3118.3118.30.0042.5380.6660.0252.99339.20.841
patient_00821.3590.1353.684355.093319.288418.0960.05239.619.4120.6660.0060.01151.6220.970.9920.1529.4340.7810.2332.721310.865272.1272.1272.10.0085.3840.9480.07119.41281.20.726
patient_0094.8860.4151.54952.8844.30985.3160.2835.63.5310.41900.0025.4890.9960.9990.0934.3650.4730.5340.41243.80441.241.241.20.0012.2460.7170.0863.53112.10.838
patient_01013.7160.3382.297220.044195.354271.4310.22222.24.5090.4520.0030.00729.5980.9890.9950.05418.610.5340.4791.724199.008172.4172.4172.40.0053.3560.7780.0264.509470.806
patient_01111.5250.2413.042202.257170.498270.2350.0917.811.0790.6190.0030.00623.5610.9860.9950.14515.3740.7070.3051.426156.56142.6142.6142.60.0054.4270.910.07811.07945.90.751
patient_01210.930.3582.874142.962132.508172.7530.1512.76.6820.5990.0010.00320.4750.9850.9980.13713.6590.6190.3921.268133.399126.8126.8126.80.0024.1830.850.0536.682210.703
patient_01314.9210.2033.422262.995231.609324.1680.0682614.7110.6540.0040.00835.0820.9780.9940.15621.4320.7470.2661.984219.964198.4198.4198.40.0064.9890.9320.07414.711580.719
patient_01412.5750.5852.179197.939176.597243.4690.3522.72.860.4360.0020.00626.5820.9880.9960.05217.0130.4130.6011.577175.998157.7157.7157.70.0043.1840.650.0182.8642.90.767
patient_01515.9650.2233.168256.497235.69298.7210.08929.711.30.5970.0030.00738.7670.980.9950.11123.2780.710.3042.154245.062215.4215.4215.40.0054.6270.9110.05211.349.50.764
patient_01612.1120.641.739185.118159.595240.2940.42418.52.3580.3580.0020.00622.5580.9920.9960.03514.820.3520.661.375158.988137.5137.5137.50.0042.5420.5760.0172.358420.822
patient_01712.6820.2532.65190.523165.267247.5190.14415.56.9280.5380.0020.00524.0550.9880.9960.09415.6450.6260.3851.451160.459145.1145.1145.10.0043.8610.8560.0486.92838.40.777
patient_0185.1760.5211.7168.05257.194105.8650.31963.1310.43400.0027.3120.9960.9990.0895.6240.4390.5680.52856.30452.852.852.80.0012.4820.6810.0593.13114.30.782
patient_0198.7640.2382.75117.019101.269160.0770.101109.8980.6120.0010.00414.0170.990.9980.1649.8910.6890.3210.921100.03892.192.192.10.0023.9940.8990.1089.89823.40.762
patient_0204.0550.9540.29446.93738.35981.8530.913.71.0990.08400.0024.6250.9980.9990.013.7460.0470.9570.35539.78935.535.535.50.0010.4330.090.0311.09910.30.925
patient_0219.4850.9260.491145.711117.66209.040.858151.1650.1110.0020.00614.580.9970.9960.00710.2280.0740.9350.952126.895.295.295.20.0040.7280.1420.0121.16539.30.927
patient_02214.8660.5062.601236.33215.697279.4140.26525.93.7790.4990.0030.00734.7120.9820.9950.06621.2480.490.5251.967218.421196.7196.7196.70.0053.8050.7350.0193.77945.70.739
patient_0236.8920.681.482100.41185.57143.6170.4759.12.1070.3440.0010.00311.4770.9950.9980.0458.3280.3140.6940.77785.43477.777.777.70.0022.1590.5250.0272.10719.90.814
patient_0247.8910.9270.46111.95486.239178.0080.869.41.1630.1110.0020.00410.110.9980.9970.0097.4590.0740.9340.69792.5769.769.769.70.0030.6790.140.0171.16328.90.913
patient_0254.5280.7111.13352.10441.70191.2910.5254.41.9040.31400.0024.9850.9970.9990.0584.0060.2780.7270.37940.64937.937.937.90.0011.6450.4750.051.90412.30.829
patient_0266.8060.7061.38482.66970.913120.6180.5077.61.9730.3340.0010.0039.4130.9960.9980.0477.0140.2910.7170.65671.30665.665.665.60.0022.0150.4930.031.97316.40.812
patient_02710.5910.2032.837158.235136.719208.1130.09615.510.4550.5970.0020.00519.2320.9880.9970.13812.9530.6980.3131.203130.374120.3120.3120.30.0034.1260.9040.08710.45534.80.77
patient_02817.7670.173.351340.553300.292412.4770.07833.612.7570.6150.0050.0146.2830.9760.9920.11626.9260.7270.2872.49284.8652492492490.0084.8980.9220.05112.757780.734
patient_0297.4010.4252.13180.85170.88115.3810.2246.24.4560.5100.0029.6150.9940.9990.1157.1440.5320.4770.66870.40366.866.866.80.0013.0940.7760.0674.45614.20.763
patient_0303.950.5691.36345.32536.56984.810.3912.52.5580.38900.0024.40.9970.9990.0893.5830.3790.6270.3435.4063434340.0011.9770.6090.0752.5588.20.789
patient_03111.0780.2083.178184.15161.285235.4930.0816.712.450.6460.0020.00523.6180.9830.9960.16715.4070.7240.2871.429151.223142.9142.9142.90.0044.6250.920.08712.4538.30.704
patient_0324.80.4091.66742.33438.24961.6650.27753.6110.46400.0024.8650.9960.9990.1213.920.4790.5280.37139.75837.137.137.10.0012.4160.7230.0983.6118.10.767
patient_03310.9560.2213.159166.344142.767226.4390.0851011.7190.6570.0010.00420.5760.9840.9970.18413.7130.7150.2961.273131.58127.3127.3127.30.0034.5950.9150.09211.71928.20.686
patient_03416.2280.462.725254.457229.63305.8620.22422.74.4560.5180.0030.00736.7810.9810.9950.07222.290.5320.4842.063228.914206.3206.3206.30.0053.9860.7760.0224.45647.60.747
patient_0359.6660.2372.849131.463121.285160.9030.11711.98.5140.6050.0010.00318.3810.9870.9980.14512.4640.6640.3471.158121.658115.8115.8115.80.0024.1440.8830.0748.51420.20.718
patient_0362.4130.9340.28620.66715.70547.2380.87621.1410.10900.0011.670.9980.9990.0261.4660.0650.9370.14517.85814.514.514.50.0010.4150.1240.0811.1416.20.864
patient_0375.8020.3751.48266.5852.916114.9690.34.73.3320.38600.0026.4690.9960.9990.0745.0490.4570.550.47551.85847.547.547.50.0012.150.70.073.33214.50.851
patient_0385.9440.4131.76663.48455.71793.3950.2785.53.5960.44800.0027.3290.9950.9990.0955.6350.4770.530.52954.99252.952.952.90.0012.5630.7220.0683.59611.10.786
patient_03912.450.1583.149202.605181.765249.7290.08119.212.3110.6230.0020.00528.1110.9830.9960.1417.8280.7220.291.652179.838165.2165.2165.20.0044.5880.9190.07512.31137.20.734
patient_0403.870.4721.16942.48530.80490.530.3932.12.5460.35700.0023.3640.9970.9990.0872.8120.3770.6280.26928.18826.926.926.90.0011.6940.6070.0952.5468.40.834
patient_0415.0240.4281.69957.24346.0299.7530.2644.43.7850.45700.0025.5970.9960.9990.1114.4410.4910.5160.41945.91241.941.941.90.0012.4630.7360.0913.78511.70.779
patient_0424.3880.8910.57734.83231.5552.9810.7973.61.2550.1700.0013.9280.9980.9990.0273.2350.1080.8950.30832.0230.830.830.80.0010.8410.2030.0411.2556.10.869
patient_0437.8550.462.118116.10386.772212.8710.24634.0590.4960.0010.00310.8370.9930.9980.1027.9260.5090.50.7477.037474740.0023.0770.7540.0554.05918.40.766
patient_0444.6480.9580.27442.18636.48466.4690.9185.61.090.07900.0024.5040.9980.9990.013.6590.0420.9610.34739.69234.734.734.70.0010.4040.0820.0311.099.50.929
patient_0459.2170.4032.118121.98100.456179.7410.2369.34.230.4770.0010.00413.2130.9930.9970.0869.4020.5190.490.87693.58787.687.687.60.0033.0790.7640.0484.2325.60.774
patient_0464.1060.820.6342.96330.00391.1450.6913.61.4480.19700.0023.1240.9980.9990.0372.6270.1710.8330.25233.76225.225.225.20.0010.9140.3090.0581.448130.871
patient_04716.2920.282.767247.855216.74308.9250.13324.87.5240.5370.0040.00832.0630.9860.9940.08419.8910.6420.3711.842210.583184.2184.2184.20.0064.0380.8670.0417.52456.10.771
patient_0484.3980.9720.18139.2329.34980.4280.9453.11.0580.05700.0023.2650.9980.9990.0082.7360.0280.9750.26231.77726.226.226.20.0010.2660.0550.0411.058100.934
patient_0497.7660.3281.89588.19477.719119.9360.23210.44.3150.4460.0010.00310.5820.9950.9980.087.7630.5240.4850.72581.65972.572.572.50.0022.7530.7680.064.31518.20.823
patient_05016.0410.1663.375238.375213.839289.8250.06921.514.4850.6490.0030.00633.5830.9780.9950.15420.6720.7450.2681.914206.625191.4191.4191.40.0054.9210.9310.07614.48546.20.712
patient_05112.9650.4112.695193.632172.897239.5010.18819.65.3070.540.0020.00626.1790.9860.9960.09216.7960.5720.4411.557171.619155.7155.7155.70.0043.9290.8120.0345.30739.40.754
patient_05214.0940.3722.561203.307178.744256.2040.18419.85.4260.5120.0020.00626.5060.9880.9960.07916.970.5760.4361.573175.806157.3157.3157.30.0043.7350.8160.0355.42642.60.772
patient_05312.0220.2812.843186.495165.239233.3630.12119.18.2680.5750.0020.00624.5340.9870.9960.11415.9060.6590.3531.475161.067147.5147.5147.50.0044.1410.8790.0568.26839.50.758
patient_05413.0520.2442.994205.205186.265246.5020.10122.89.9510.5890.0020.00629.1390.9850.9960.11618.3710.690.3221.702191.037170.2170.2170.20.0044.3650.8990.0589.95140.60.771
patient_05513.8580.4362.705239.039205.412306.8750.20520.64.8870.5320.0030.00729.5550.9850.9950.08418.5880.5530.461.722190.916172.2172.2172.20.0053.9480.7950.0284.88752.80.749
patient_0569.8060.2652.482113.721103.821141.6550.14414.36.9650.5450.0010.00315.1360.9910.9980.11510.5640.6270.3830.983107.22398.398.398.30.0023.6090.8560.0716.96521.10.77
patient_0575.5450.830.79755.20145.54393.4280.6965.41.4380.21500.0025.6440.9980.9990.034.4730.1680.8380.42246.20242.242.242.20.0011.160.3040.0341.43810.30.863
patient_0589.5080.6931.536127.002109.113172.650.48812.52.0510.3390.0010.00414.9910.9940.9970.03910.4770.3050.7050.975109.39197.597.597.50.0032.2420.5120.0212.05127.50.814
patient_05912.2060.1463.094142.632135.244164.7870.0711514.0660.6390.0010.00321.3830.9850.9980.16614.1690.7410.271.315141.994131.5131.5131.50.0024.5010.9290.10714.06618.90.748
patient_0606.7350.8250.86792.33971.788149.3860.6857.51.4610.2140.0010.0048.5040.9970.9980.0246.4170.1740.8320.60171.87560.160.160.10.0021.2660.3150.0241.46123.10.868
patient_0614.3420.9720.19933.83731.30949.7930.9452.81.0590.05900.0013.9280.99810.0083.2350.0280.9750.30835.54230.830.830.80.0010.2940.0550.0341.05950.939
patient_0625.4720.2922.19157.85649.67692.6590.1814.35.540.57200.0026.4050.9940.9990.1755.0050.5810.4270.47147.30747.147.147.10.0013.1770.8190.1185.548.80.706
patient_0639.6780.5841.604111.55495.686152.5390.37313.42.6780.3640.0010.00412.8590.9950.9970.0489.1850.3930.6160.85699.42585.685.685.60.0032.3350.6270.0312.67826.30.847
patient_0643.9610.5841.12551.15637.222105.7540.4343.32.3020.32500.0024.1640.9970.9990.0673.4090.3440.6610.32435.70432.432.432.40.0011.6310.5660.0712.30211.50.849
patient_06531.2610.1174.357552.24516.702609.5980.03466.729.5030.7240.0080.01499.2320.9330.9890.18249.6940.8240.1934.587526.176458.7458.7458.70.0116.40.9660.06429.503111.70.656
patient_0661.2230.9590.20914.53312.20930.8270.921.61.0870.08600.0011.3220.99810.0221.1730.0410.960.11812.82311.811.811.800.3040.080.0931.0873.50.873
patient_06710.5330.7571.267185.211150.312261.9570.58214.71.720.2680.0030.00619.3850.9940.9960.02213.040.240.7721.211141.471121.1121.1121.10.0041.8570.4180.0141.7243.70.852
patient_06812.3780.1942.829186.332164.461235.3250.10417.99.6330.5730.0020.00624.3750.9870.9960.11315.8190.6850.3271.467162.572146.7146.7146.70.0044.1210.8960.0669.63338.20.784
patient_0694.5830.7530.64853.06737.112112.5110.6213.41.6090.1900.0023.9870.9980.9990.0313.2790.2140.7910.31240.86231.231.231.20.0010.9410.3790.0521.60912.80.921
patient_07011.130.2792.826131.358123.236155.8560.12412.98.0590.5960.0010.00319.0210.9870.9980.13812.8330.6540.3561.192125.656119.2119.2119.20.0024.1120.8760.0688.05918.80.72
patient_0715.9880.4041.66363.15551.953102.4740.2825.93.5530.43400.0026.4550.9960.9990.0945.0380.4740.5330.47449.53147.447.447.40.0012.4130.7180.0753.55313.60.812
patient_07211.4710.2292.758163.176140.942215.0120.12115.48.2580.5770.0020.00519.9780.9880.9970.12313.3760.6590.3521.242132.955124.2124.2124.20.0044.0130.8790.0678.258350.751
patient_0733.9850.3511.85739.530.85678.20.211.24.7740.55900.0013.5370.9960.9990.2022.9420.5480.4590.28127.63928.128.128.10.0012.6880.790.174.77460.724
patient_07415.3160.23.169226.097202.856275.1840.08722.111.5440.6160.0030.00631.5750.9820.9960.1319.6410.7130.31.819199.12181.9181.9181.90.0044.620.9130.06311.54444.60.738
patient_07513.0440.3113.071174.409164.052201.0610.1220.88.3190.6130.0010.00426.5210.9820.9970.13616.9810.660.3521.574169.247157.4157.4157.40.0034.4760.880.0538.31926.20.725
patient_07613.1670.3362.861186.593165.051235.0680.14187.1420.5780.0020.00524.5940.9860.9960.11615.9390.6320.381.478160.654147.8147.8147.80.0044.1670.860.0487.14237.80.738
patient_07712.0930.462.344167.736148.555211.0090.24620.24.0690.4840.0020.00521.7160.9890.9960.07314.3530.5090.5021.332147.723133.2133.2133.20.0043.4170.7540.0314.069370.759
patient_07813.7740.2763.004217.508192.366272.6340.1119.19.120.5910.0020.00629.3290.9830.9960.11718.4680.6760.3371.711186.279171.1171.1171.10.0044.3810.890.0539.1240.10.745
patient_07914.0080.2063.221165.954157.416189.8720.08816.911.4130.6470.0010.00425.5530.9810.9980.16416.460.7110.3011.526161.042152.6152.6152.60.0024.6920.9120.07511.41321.70.682
  22 in total

Review 1.  Recurrent Clostridium difficile infection and the microbiome.

Authors:  Rowena Almeida; Teklu Gerbaba; Elaine O Petrof
Journal:  J Gastroenterol       Date:  2015-07-08       Impact factor: 7.527

Review 2.  Clostridium difficile infection in the community: a zoonotic disease?

Authors:  M P M Hensgens; E C Keessen; M M Squire; T V Riley; M G J Koene; E de Boer; L J A Lipman; E J Kuijper
Journal:  Clin Microbiol Infect       Date:  2012-04-27       Impact factor: 8.067

3.  UPARSE: highly accurate OTU sequences from microbial amplicon reads.

Authors:  Robert C Edgar
Journal:  Nat Methods       Date:  2013-08-18       Impact factor: 28.547

Review 4.  Clostridium difficile infection.

Authors:  Daniel A Leffler; J Thomas Lamont
Journal:  N Engl J Med       Date:  2015-04-16       Impact factor: 91.245

Review 5.  Clostridium difficile infection: new developments in epidemiology and pathogenesis.

Authors:  Maja Rupnik; Mark H Wilcox; Dale N Gerding
Journal:  Nat Rev Microbiol       Date:  2009-07       Impact factor: 60.633

6.  Evaluation of general 16S ribosomal RNA gene PCR primers for classical and next-generation sequencing-based diversity studies.

Authors:  Anna Klindworth; Elmar Pruesse; Timmy Schweer; Jörg Peplies; Christian Quast; Matthias Horn; Frank Oliver Glöckner
Journal:  Nucleic Acids Res       Date:  2012-08-28       Impact factor: 16.971

7.  UCHIME improves sensitivity and speed of chimera detection.

Authors:  Robert C Edgar; Brian J Haas; Jose C Clemente; Christopher Quince; Rob Knight
Journal:  Bioinformatics       Date:  2011-06-23       Impact factor: 6.937

8.  The SILVA ribosomal RNA gene database project: improved data processing and web-based tools.

Authors:  Christian Quast; Elmar Pruesse; Pelin Yilmaz; Jan Gerken; Timmy Schweer; Pablo Yarza; Jörg Peplies; Frank Oliver Glöckner
Journal:  Nucleic Acids Res       Date:  2012-11-28       Impact factor: 16.971

9.  PEAR: a fast and accurate Illumina Paired-End reAd mergeR.

Authors:  Jiajie Zhang; Kassian Kobert; Tomáš Flouri; Alexandros Stamatakis
Journal:  Bioinformatics       Date:  2013-10-18       Impact factor: 6.937

10.  Dynamics of the fecal microbiome in patients with recurrent and nonrecurrent Clostridium difficile infection.

Authors:  Anna Maria Seekatz; Krishna Rao; Kavitha Santhosh; Vincent Bensan Young
Journal:  Genome Med       Date:  2016-04-27       Impact factor: 11.117

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  9 in total

Review 1.  Surveying Gut Microbiome Research in Africans: Toward Improved Diversity and Representation.

Authors:  Ryan Brewster; Fiona B Tamburini; Edgar Asiimwe; Ovokeraye Oduaran; Scott Hazelhurst; Ami S Bhatt
Journal:  Trends Microbiol       Date:  2019-06-06       Impact factor: 17.079

2.  Characterization of Gut Microbiota in Hospitalized Patients with Clostridioides difficile Infection.

Authors:  Bahareh Vakili; Abolfazl Fateh; Hamid Asadzadeh Aghdaei; Fattah Sotoodehnejadnematalahi; Seyed Davar Siadat
Journal:  Curr Microbiol       Date:  2020-04-15       Impact factor: 2.188

3.  Globally Abundant "Candidatus Udaeobacter" Benefits from Release of Antibiotics in Soil and Potentially Performs Trace Gas Scavenging.

Authors:  Inka M Willms; Anina Y Rudolph; Isabell Göschel; Simon H Bolz; Dominik Schneider; Caterina Penone; Anja Poehlein; Ingo Schöning; Heiko Nacke
Journal:  mSphere       Date:  2020-07-08       Impact factor: 4.389

4.  The microbial diversity following antibiotic treatment of Clostridioides difficile infection.

Authors:  Omry Koren; Avi Peretz; Dana Binyamin; Orna Nitzan; Maya Azrad; Zohar Hamo
Journal:  BMC Gastroenterol       Date:  2021-04-13       Impact factor: 3.067

5.  Microbiome differential abundance methods produce different results across 38 datasets.

Authors:  Jacob T Nearing; Gavin M Douglas; Molly G Hayes; Jocelyn MacDonald; Dhwani K Desai; Nicole Allward; Casey M A Jones; Robyn J Wright; Akhilesh S Dhanani; André M Comeau; Morgan G I Langille
Journal:  Nat Commun       Date:  2022-01-17       Impact factor: 14.919

6.  Geographical separation and ethnic origin influence the human gut microbial composition: a meta-analysis from a Malaysian perspective.

Authors:  Jacky Dwiyanto; Qasim Ayub; Sui Mae Lee; Su Chern Foo; Chun Wie Chong; Sadequr Rahman
Journal:  Microb Genom       Date:  2021-08

7.  Fusobacteriumnucleatum Adheres to Clostridioides difficile via the RadD Adhesin to Enhance Biofilm Formation in Intestinal Mucus.

Authors:  Melinda A Engevik; Heather A Danhof; Jennifer Auchtung; Bradley T Endres; Wenly Ruan; Eugénie Bassères; Amy C Engevik; Qinglong Wu; Maribeth Nicholson; Ruth Ann Luna; Kevin W Garey; Sue E Crawford; Mary K Estes; Renate Lux; Mary Beth Yacyshyn; Bruce Yacyshyn; Tor Savidge; Robert A Britton; James Versalovic
Journal:  Gastroenterology       Date:  2020-11-21       Impact factor: 22.682

8.  Microeukaryotic Communities on the Fruit of Gardenia thunbergia Thunb. with a Focus on Pathogenic Fungi.

Authors:  Bastian Steudel; Himansu Baijnath; Thorben Schwedt; Armin Otto Schmitt
Journal:  Pathogens       Date:  2021-05-04

9.  Bacterial succession along a sediment porewater gradient at Lake Neusiedl in Austria.

Authors:  Avril Jean Elisabeth von Hoyningen-Huene; Dominik Schneider; Dario Fussmann; Andreas Reimer; Gernot Arp; Rolf Daniel
Journal:  Sci Data       Date:  2019-08-30       Impact factor: 6.444

  9 in total

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