Evidence map›Paper›PMID 19482929›Full record

ArticleJournal of bacteriology2009

Heat-resistant agglutinin 1 is an accessory enteroaggregative Escherichia coli colonization factor.

Samhita Bhargava, Brandon B Johnson, Jennifer Hwang, Tamia A Harris, Anu S George, Amanda Muir, Justin Dorff, Iruka N Okeke

Open access · greenAbstract read
In one paragraph

Article in Journal of bacteriology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
1.7field-weighted citation impact, top 19% 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

26 citing papers in PubMed, 40 citations in OpenAlex.

  1. Article
  2. EnteroaggregativeEcoSal Plus · 2025
    Review
  3. Genomic Dissection of an EnteroaggregativeInternational journal of molecular sciences · 2024
    Article
  4. Article
  5. Article
  6. Article
  7. Review
  8. Article
  9. Journal of clinical microbiology · 2020
    Article
  10. Article
  11. Article
  12. Article
  13. Genetic and Virulence Profiles of EnteroaggregativeFrontiers in cellular and infection microbiology · 2020
    Article
  14. Article
  15. Bacterial autoaggregation.AIMS microbiology · 2018
    Review
  16. Article
  17. Article
  18. Review
  19. Review
  20. Review
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

8 authors at 1 institution in 1 country.

Samhita BhargavaDepartment of Biology, Haverford College, Haverford, PA 19041, USA.
Brandon B Johnson
Jennifer Hwang
Tamia A Harris
Anu S George
Amanda Muir
Justin Dorff
Iruka N Okeke
Haverford College · US

Funding

Howard Hughes Medical Institute
6 · The paper itself

Abstract

Enteroaggregative Escherichia coli (EAEC) is an important cause of acute and persistent diarrhea. The defining stacked brick adherence pattern of Peruvian EAEC isolate 042 has previously been attributed to aggregative adherence fimbriae II (AAF/II), which confer aggregative adherence on laboratory E. coli strains. EAEC strains also show exceptional autoaggregation and biofilm formation, other phenotypes that have hitherto been ascribed to AAF/II. We report that EAEC 042 carries the heat-resistant agglutinin (hra1) gene, also known as hek, which encodes an outer membrane protein. Like AAF/II, the cloned EAEC 042 hra1 gene product is sufficient to confer autoaggregation, biofilm formation, and aggregative adherence on nonadherent and nonpathogenic laboratory E. coli strains. However, an 042 hra1 deletion mutant is not deficient in these phenotypes compared to the wild type. EAEC strain 042 produces a classic honeycomb or stacked brick pattern of adherence to epithelial cells. Unlike wild-type 042, the hra1 mutant typically does not form a tidy stacked brick pattern on HEp-2 cells in culture, which is definitive for EAEC. Moreover, the hra1 mutant is significantly impaired in the Caenorhabditis elegans slow kill colonization model. Our data suggest that the exceptional colonization of strain 042 is due to multiple factors and that Hra1 is an accessory EAEC colonization factor.

Indexed as

Adhesins, BacterialAnimalsBiofilmsBlotting, WesternCaenorhabditis elegansElectrophoresis, Polyacrylamide GelEscherichia coliEscherichia coli ProteinsSequence DeletionAdhesins, BacterialEscherichia coli ProteinsHRA1 protein, E coli

Identifiers

PMID19482929
PMCPMC2715708
OpenAlexW2023096751

What OpenQuestion holds

Textmetadata
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.