Evidence map›Paper›PMID 27699286›Full record

ArticleHeliyon2016

Significant loss of sensitivity and specificity in the taxonomic classification occurs when short 16S rRNA gene sequences are used.

Marcel Martínez-Porchas, Enrique Villalpando-Canchola, Francisco Vargas-Albores

Abstract read
In one paragraph

Article in Heliyon, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed
–field-weighted citation impact
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

52 citing papers in PubMed.

  1. Trial
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  5. [Comparative analysis of microbial communities in different oral ecological niches of preschool children].Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2026
    Article
  6. Oral Administration ofAnimals : an open access journal from MDPI · 2026
    Article
  7. Article
  8. Article
  9. Article
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  12. Analysis of metagenomic data.Nature reviews. Methods primers · 2025
    Article
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  14. 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

3 authors.

Marcel Martínez-PorchasCentro de Investigación en Alimentación y Desarrollo, A. C. Km 0.6 Carretera a La Victoria, Hermosillo, Sonora, Mexico.
Enrique Villalpando-CancholaCentro de Investigación en Alimentación y Desarrollo, A. C. Km 0.6 Carretera a La Victoria, Hermosillo, Sonora, Mexico.
Francisco Vargas-AlboresCentro de Investigación en Alimentación y Desarrollo, A. C. Km 0.6 Carretera a La Victoria, Hermosillo, Sonora, Mexico.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The classification performance of Kraken was evaluated in terms of sensitivity and specificity when using short and long 16S rRNA sequences. A total of 440,738 sequences from bacteria with complete taxonomic classifications were downloaded from the high quality ribosomal RNA database SILVA. Amplicons produced (86,371 sequences; 1450 bp) by virtual PCR with primers covering the V1-V9 region of the 16S-rRNA gene were used as reference. Virtual PCŔs of internal fragments V3-V4, V4-V5 and V3-V5 were performed. A total of 81,523, 82,334 and 82,998 amplicons were obtained for regions V3-V4, V4-V5 and V3-V5 respectively. Differences in depth of taxonomic classification were detected among the internal fragments. For instance, sensitivity and specificity of sequences classified up to subspecies level were higher when the largest internal fraction (V3-V5) was used (54.0 and 74.6% respectively), compared to V3-V4 (45.1 and 66.7%) and V4-V5 (41.8 and 64.6%) fragments. Similar pattern was detected for sequences classified up to more superficial taxonomic categories (i.e. family, order, class…). Results also demonstrate that internal fragments lost specificity and some could be misclassified at the deepest taxonomic levels (i.e. species or subspecies). It is concluded that the larger V3-V5 fragment could be considered for massive high throughput sequencing reducing the loss of sensitivity and sensibility.

Indexed as

BioinformaticsBiological sciencesGeneticsMicrobiology

Identifiers

PMID27699286
PMCPMC5037269

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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.