Evidence map›Paper›PMID 12517864›Full record

ArticleJournal of clinical microbiology2003

Culture-independent molecular analysis of microbial constituents of the healthy human outer ear.

Daniel N Frank, George B Spiegelman, William Davis, Eileen Wagner, Eric Lyons, Norman R Pace

Open access · greenAbstract read
In one paragraph

Article in Journal of clinical microbiology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
5.7field-weighted citation impact, top 4% 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

45 citing papers in PubMed, 112 citations in OpenAlex.

  1. Microbiome and its Association with Diseases of the Ear, Nose and Pharynx.Endocrine, metabolic & immune disorders drug targets · 2026
    Review
  2. Association between theMicrobiology spectrum · 2025
    Article
  3. Review
  4. Cholesteatoma has an altered microbiota with a higher abundance ofLaryngoscope investigative otolaryngology · 2022
    Article
  5. Article
  6. Article
  7. Review
  8. Article
  9. Review
  10. Article
  11. Review
  12. Reviewing the Pathogenic Potential of the Otitis-Associated BacteriaFrontiers in cellular and infection microbiology · 2020
    Review
  13. Review
  14. [Turicella otitidis, contributions to its role in the etiology of ear infections].Revista espanola de quimioterapia : publicacion oficial de la Sociedad Espanola de Quimioterapia · 2018
    Article
  15. Article
  16. Characterization of Sinus Microbiota by 16S Sequencing from Swabs.Methods in molecular biology (Clifton, N.J.) · 2017
    Article
  17. Frontiers in cellular and infection microbiology · 2017
    Article
  18. Article
  19. Article
  20. Review
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

6 authors at 3 institutions in 2 countries.

Daniel N FrankDepartment of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, Colorado 80309-0347, USA.
George B Spiegelman
William Davis
Eileen Wagner
Eric Lyons
Norman R Pace
University of Colorado Boulder · USMolecular Sciences Institute · USUniversity of British Columbia · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Molecular-phylogenetic sequence analyses have provided a new perspective on microbial communities by allowing the detection and identification of constituent microorganisms in the absence of cultivation. In this study we used broad-specificity amplification of ribosomal DNA (rDNA) genes to survey organisms present in the human outer ear canal. Samples were obtained from 24 individuals, including members of three extended families, in order to survey the resident microbiota and to examine microbial population structures in individuals related by familial or household associations. To examine the stability of the microbial populations, one individual was sampled four times and another twice over a 14-month period. We found that a distinct set of microbial types was present in the majority of the subjects sampled. The two most prevalent rDNA sequence types that were identified in multiple individuals corresponded closely to those of Alloiococcus otitis and Corynebacterium otitidis, commonly thought to be associated exclusively with infections of the middle ear. Our results suggest, therefore, that the outer ear canal may serve as a reservoir for normally commensal microbes that can contribute to pathogenesis upon introduction into the middle ear. Alternatively, culture analyses of diseases of the middle ear may have been confounded by these contaminating commensal organisms.

Indexed as

BacteriaCell Culture TechniquesDNA, BacterialEar CanalHumansReverse Transcriptase Polymerase Chain ReactionRNA, RibosomalDNA, BacterialRNA, Ribosomal

Identifiers

PMID12517864
PMCPMC149572
OpenAlexW2027450488

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.