Evidence map›Paper›PMID 28716079›Full record

ArticleBMC microbiology2017

The human jejunum has an endogenous microbiota that differs from those in the oral cavity and colon.

Olof H Sundin, Antonio Mendoza-Ladd, Mingtao Zeng, Diana Diaz-Arévalo, Elisa Morales, B Matthew Fagan, Javier Ordoñez, Philip Velez, Nishaal Antony, Richard W McCallum

Open access · goldAbstract readComparative Study
In one paragraph

Article in BMC microbiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed
3.8field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

58 citing papers in PubMed, 112 citations in OpenAlex.

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  15. Hyperoxia as a driver of gut dysbiosis.Frontiers in microbiology · 2025
    Review
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  19. Re-framing the importance of Group BInfection and immunity · 2024
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 3 institutions in 1 country.

Olof H SundinDepartment of Biomedical Sciences, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA. olof.sundin@ttuhsc.edu.
Antonio Mendoza-LaddDepartment of Internal Medicine, Division of Gastroenterology, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
Mingtao ZengDepartment of Biomedical Sciences, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
Diana Diaz-ArévaloDepartment of Biomedical Sciences, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
Elisa MoralesDepartment of Biomedical Sciences, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
B Matthew FaganDepartment of Biomedical Sciences, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
Javier OrdoñezBiostatistics Unit, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
Philip VelezDepartment of Biomedical Sciences, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
Nishaal AntonyDepartment of Internal Medicine, Division of Gastroenterology, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
Richard W McCallumDepartment of Internal Medicine, Division of Gastroenterology, Texas Tech University Health Sciences Center at El Paso, El Paso, 79905, TX, USA.
The University of Texas at El Paso · USTexas Tech University Health Sciences Center · USTexas Tech University · US

Funding

Genetic Basis of Nanophthalmos and Human Ocular BiometryR01EY013610 · NEI · TEXAS TECH UNIVERSITY HEALTH SCIS CENTER · PI SUNDIN, OLOF H · 2001 to 2010
$1.5M
NEI NIH HHS R01 EY013610
6 · The paper itself

Abstract

backgroundThe upper half of the human small intestine, known as the jejunum, is the primary site for absorption of nutrient-derived carbohydrates, amino acids, small peptides, and vitamins. In contrast to the colon, which contains 10

resultsThe lumen of the upper jejunum was sampled during enteroscopy of 20 research subjects. Culture on aerobic and anaerobic media gave live bacterial counts ranging from 5.8 × 10

conclusionsThe jejunal lumen contains a distinctive bacterial population consisting primarily of facultative anaerobes and oxygen-tolerant obligate anaerobes similar to those found in the oral cavity. However, the frequent abundance of Enterobacteriaceae represents a major difference from oral microbiota. Although a few genera are shared with the colon, we found no evidence for retrograde movement of the most abundant colonic microbes to the jejunum. Some individuals had much higher bacterial loads, but this was not correlated with decreases in bacterial species diversity or other evidence of dysbiosis.

Indexed as

MicrobiotaAdultAgedBacteriaColonFemaleHumansJejunumMaleMiddle AgedMouthBacterial loadJejunumMetagenomicsMicrobiomeSmall intestine

Identifiers

PMID28716079
PMCPMC5513040
OpenAlexW2735801463

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.