Evidence map›Paper›PMID 26926762›Full record

ArticleBMC microbiology2016

Principal component analysis of MALDI TOF MS mass spectra separates M. abscessus (sensu stricto) from M. massiliense isolates.

Jan Kehrmann, Sarah Wessel, Roshni Murali, Annegret Hampel, Franz-Christoph Bange, Jan Buer, Frank Mosel

Abstract readEvaluation Study
In one paragraph

Article in BMC microbiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
–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

18 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Diagnostic performance of MALDI-TOF MS for non-tuberculous mycobacteria: A systematic review and meta-analysis.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2026
    Pooled it
  2. Article
  3. NGS-based approach for diagnostically unidentifiedFrontiers in cellular and infection microbiology · 2025
    Article
  4. Article
  5. Review
  6. CutaneousClinical, cosmetic and investigational dermatology · 2024
    Article
  7. Article
  8. Article
  9. Article
  10. An Improved Method for Rapid Detection ofFrontiers in chemistry · 2021
    Article
  11. Identification of Mycobacterium abscessus species and subspecies using the Cas12a/sgRNA-based nucleic acid detection platform.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2020
    Article
  12. PCR amplification of theExperimental and therapeutic medicine · 2020
    Article
  13. Article
  14. Article
  15. Review of the impact of MALDI-TOF MS in public health and hospital hygiene, 2018.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2019
    Article
  16. Article
  17. Frontiers in microbiology · 2017
    Article
  18. Direct matrix-assisted laser desorption ionisation time-of-flight mass spectrometry identification of mycobacteria from colonies.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2016
    Article
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

7 authors.

Jan KehrmannInstitute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany. jan.kehrmann@uk-essen.de.
Sarah WesselInstitute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany.
Roshni MuraliInstitute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany.
Annegret HampelDepartment of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hanover, Germany.
Franz-Christoph BangeDepartment of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hanover, Germany.
Jan BuerInstitute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany.
Frank MoselInstitute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe discrimination of the members of the Mycobacterium abscessus complex is of clinical interest because one of the subspecies, M. massiliense, exhibits higher rates of response to antibiotic treatment for lung infection than do the other members of that complex. M. abscessus complex contains three subspecies that are laborious to identify; therefore, a routine diagnostic tool would be worthwhile.

resultsWe used principal component analysis, hierarchical cluster analysis, and single-peak analysis to examine peak lists derived from matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI TOF MS) mass spectra of 50 clinical M. abscessus complex isolates, including 28 M. abscessus (sensu stricto), 19 M. massiliense, and 3 M. bolletii isolates grown in mycobacterium growth indicator tube liquid medium and prepared with a bead-based protocol. Principal component analysis but not hierarchical cluster analysis separated M. abscessus (sensu stricto) isolates and M. massiliense isolates into two clusters. Furthermore, single-peak analysis displayed 4 discriminating peaks that separated M. abscessus (sensu stricto) from M. massiliense isolates. M. bolletii isolates did not exhibit specific peaks but resembled the M. abscessus (sensu stricto) peak profile and also grouped within this principal component analysis cluster. Principal component analysis of all peak lists with the exclusion of the four discriminating peaks again separated M. abscessus (sensu stricto) from M. massiliense isolates, thus relativizing the importance of these peaks for subspecies identification.

conclusionsPrincipal component analysis of peak lists derived from MALDI TOF mass spectra is a robust and convenient method of discriminating M. massiliense isolates from the other members of the M. abscessus complex.

Indexed as

Bacterial Typing TechniquesHumansMycobacteriumMycobacterium InfectionsPhylogenyPrincipal Component AnalysisSpectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization

Identifiers

PMID26926762
PMCPMC4772520

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Registered trials

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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.