Evidence map›Paper›PMID 34407825›Full record

ArticleBMC biology2021

Long-term persistence of crAss-like phage crAss001 is associated with phase variation in Bacteroides intestinalis.

Andrey N Shkoporov, Ekaterina V Khokhlova, Niamh Stephens, Cara Hueston, Samuel Seymour, Andrew J Hryckowian, Dimitri Scholz, R Paul Ross, Colin Hill

Open access · goldAbstract read
In one paragraph

Article in BMC biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed
11.6field-weighted citation impact, top 1% 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

73 citing papers in PubMed, 117 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Review
  6. Review
  7. Article
  8. Phase variation inEngineering microbiology · 2026
    Article
  9. Observational
  10. Article
  11. Article
  12. We need to talk about the virome.Microbiome research reports · 2026
    Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article

13 more citing papers are in PubMed but not listed here.

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

9 authors at 3 institutions in 2 countries.

Andrey N Shkoporov *School of Microbiology, University College Cork, Cork, Ireland. andrey.shkoporov@ucc.ie.ORCID 0000-0002-5547-8672
Ekaterina V Khokhlova *APC Microbiome Ireland, University College Cork, Cork, Ireland.
Niamh StephensConway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
Cara HuestonAPC Microbiome Ireland, University College Cork, Cork, Ireland.
Samuel SeymourAPC Microbiome Ireland, University College Cork, Cork, Ireland.
Andrew J HryckowianDepartment of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
Dimitri ScholzConway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
R Paul RossSchool of Microbiology, University College Cork, Cork, Ireland.
Colin HillSchool of Microbiology, University College Cork, Cork, Ireland. c.hill@ucc.ie.
University College Cork · IEUniversity College Dublin · IEUniversity of Wisconsin–Madison · US

Funding

Wellcome TrustWellcome Trust (GB) 220646/Z/20/Z
6 · The paper itself

Abstract

backgroundThe crAss-like phages are ubiquitous and highly abundant members of the human gut virome that infect commensal bacteria of the order Bacteroidales. Although incapable of lysogeny, these viruses demonstrate long-term persistence in the human gut microbiome, dominating the virome in some individuals.

resultsHere we show that rapid phase variation of alternate capsular polysaccharides in Bacteroides intestinalis cultures plays an important role in a dynamic equilibrium between phage sensitivity and resistance, allowing phage and bacteria to multiply in parallel. The data also suggests the role of a concomitant phage persistence mechanism associated with delayed lysis of infected cells, similar to carrier state infection. From an ecological and evolutionary standpoint, this type of phage-host interaction is consistent with the Piggyback-the-Winner model, which suggests a preference towards lysogenic or other "benign" forms of phage infection when the host is stably present at high abundance.

conclusionLong-term persistence of bacteriophage and host could result from mutually beneficial mechanisms driving bacterial strain-level diversity and phage survival in complex environments.

Indexed as

BacteriophagesBacteroidesBacteriaHumansPhase VariationPhylogenyCapsular polysaccharidesCarrier state infectioncrAss-like phagescrAssphageHerd immunityHuman gut microbiomeHuman viromePhase variation

Identifiers

PMID34407825
PMCPMC8375218
OpenAlexW3195012704

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.