Evidence map›Paper›PMID 33672780›Full record

ArticleViruses2021

Standard Bacteriophage Purification Procedures Cause Loss in Numbers and Activity.

Amanda Carroll-Portillo, Cristina N Coffman, Matthew G Varga, Joe Alcock, Sudha B Singh, Henry C Lin

Abstract readValidation Study
In one paragraph

Article in Viruses, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing 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

36 citing papers in PubMed.

  1. Article
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  6. Review
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  13. A Lambda-evo (λApplied microbiology and biotechnology · 2025
    Article
  14. Article
  15. SXP01: a novel bacteriophage for combatingFrontiers in microbiology · 2025
    Article
  16. Article
  17. Article
  18. Article
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  20. 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.

Amanda Carroll-PortilloDivision of Gastroenterology and Hepatology, Department of Internal Medicine, University of New Mexico, Albuquerque, NM 87131, USA.
Cristina N CoffmanBiomedical Research Institute of New Mexico, Albuquerque, NM 87108, USA.
Matthew G VargaBiomedical Research Institute of New Mexico, Albuquerque, NM 87108, USA.ORCID 0000-0002-2075-3224
Joe AlcockDepartment of Emergency Medicine, School of Medicine, University of New Mexico, Albuquerque, NM 87131, USA.ORCID 0000-0003-0807-164X
Sudha B SinghBiomedical Research Institute of New Mexico, Albuquerque, NM 87108, USA.
Henry C LinDivision of Gastroenterology and Hepatology, Department of Internal Medicine, University of New Mexico, Albuquerque, NM 87131, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

For decades, bacteriophage purification has followed structured protocols focused on generating high concentrations of phage in manageable volumes. As research moves toward understanding complex phage populations, purification needs have shifted to maximize the amount of phage while maintaining diversity and activity. The effects of standard phage purification procedures such as polyethylene glycol (PEG) precipitation and cesium chloride (CsCl) density gradients on both diversity and activity of a phage population are not known. We have examined the effects of PEG precipitation and CsCl density gradients on a number of known phage (M13, T4, and ΦX 174) of varying structure and size, individually and as mixed sample. Measurement of phage numbers and activity throughout the purification process was performed. We demonstrate that these methods, used routinely to generate "pure" phage samples, are in fact detrimental to retention of phage number and activity; even more so in mixed phage samples. As such, minimal amounts of processing are recommended to introduce less bias and maintain more of a phage population.

Indexed as

BacteriophagesCesiumChloridesUltracentrifugationCesiumcesium chlorideChloridesbacteriophageCsClM13PEG precipitationpurificationT4ΦX 174

Identifiers

PMID33672780
PMCPMC7924620

What OpenQuestion holds

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LicenceCC BY
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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.