Evidence map›Paper›PMID 26886585›Full record

ArticleLasers in medical science2016

Red and infrared laser therapy inhibits in vitro growth of major bacterial species that commonly colonize skin ulcers.

Natanael Teixeira Alves de Sousa, Rosana Caetano Gomes, Marcos Ferracioli Santos, Hugo Evangelista Brandino, Roberto Martinez, Rinaldo Roberto de Jesus Guirro

Abstract read
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In one paragraph

Article in Lasers in medical science, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed.

  1. Trial
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  10. "Photobiomics": Can Light, Including Photobiomodulation, Alter the Microbiome?Photobiomodulation, photomedicine, and laser surgery · 2019
    Review
  11. Article
  12. Review
  13. Article
  14. Light as a Broad-Spectrum Antimicrobial.Frontiers in microbiology · 2018
    Article
  15. 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

6 authors.

Natanael Teixeira Alves de SousaPostgraduate Program in Rehabilitation and Functional Performance, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil.
Rosana Caetano GomesPostgraduate Program in Rehabilitation and Functional Performance, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil.
Marcos Ferracioli SantosGraduation Course in Physiotherapy, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil.
Hugo Evangelista BrandinoPostgraduate Program in Rehabilitation and Functional Performance, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil.
Roberto MartinezInfectious Diseases Division of the Internal Medicine Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil.
Rinaldo Roberto de Jesus GuirroPostgraduate Program in Rehabilitation and Functional Performance, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil. rguirro@fmrp.usp.br.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Low-level laser therapy (LLLT) is used in chronic wounds due to its healing effects. However, bacterial species may colonize these wounds and the optimal parameters for effective bacterial inhibition are not clear. The aim of this study was to analyze the effect of LLLT on bacterial growth in vitro. Bacterial strains including Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa were suspended in saline solution at a concentration of 10(3) cells/ml and exposed to laser irradiation at wavelengths of 660, 830, and 904 nm at fluences of 0 (control), 3, 6, 12, 18, and 24 J/cm(2). An aliquot of the irradiated suspension was spread on the surface of petri plates and incubated at 37 °C for quantification of colony-forming unit after 24, 48, and 72 h. Laser irradiation inhibited the growth of S. aureus at all wavelengths and fluences higher than 12 J/cm(2), showing a strong correlation between increase in fluence and bacterial inhibition. However, for P. aeruginosa, LLLT inhibited growth at all wavelengths only at a fluence of 24 J/cm(2). E. coli had similar growth inhibition at a wavelength of 830 nm at fluences of 3, 6, 12, and 24 J/cm(2). At wavelengths of 660 and 904 nm, growth inhibition was only observed at fluences of 12 and 18 J/cm(2), respectively. LLLT inhibited bacterial growth at all wavelengths, for a maximum of 72 h after irradiation, indicating a correlation between bacterial species, fluence, and wavelength.

Indexed as

Low-Level Light TherapyEscherichia coliHumansInfrared RaysPseudomonas aeruginosaSkin UlcerStaphylococcus aureusWound HealingEscherichia coliLow-level laser therapyPseudomonas aeruginosaSkin ulcersStaphylococcus aureus

Identifiers

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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.