Evidence map›Paper›PMID 33908603›Full record

ArticlePathogens and disease2021

Virulence potential of Rickettsia amblyommatis for spotted fever pathogenesis in mice.

Wan-Yi Yen, Kayla Stern, Smruti Mishra, Luke Helminiak, Santiago Sanchez-Vicente, Hwan Keun Kim

Open access · hybridAbstract read
In one paragraph

Article in Pathogens and disease, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
5.1field-weighted citation impact, top 4% 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

23 citing papers in PubMed, 37 citations in OpenAlex.

  1. Tropical medicine and infectious disease · 2026
    Article
  2. Article
  3. Article
  4. Distribution ofParasite epidemiology and control · 2025
    Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Spotted Fever GroupInsects · 2024
    Review
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Microorganisms · 2023
    Review
  17. Article
  18. Infection and immunity · 2022
    Review
  19. Brown Dog Tick (International journal of environmental research and public health · 2022
    Article
  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 at 1 institution in 1 country.

Wan-Yi YenDivision of Laboratory Animal Resources, Laboratory of Comparative Medicine, Stony Brook University, Stony Brook, NY 11794, USA.
Kayla SternJohn F. Kennedy High School, Bellmore, NY 11710, USA.
Smruti MishraCenter for Infectious Diseases, Department of Microbiology and Immunology, Stony Brook University, Stony Brook, NY 11794, USA.
Luke HelminiakCenter for Infectious Diseases, Department of Microbiology and Immunology, Stony Brook University, Stony Brook, NY 11794, USA.
Santiago Sanchez-VicenteCenter for Infectious Diseases, Department of Microbiology and Immunology, Stony Brook University, Stony Brook, NY 11794, USA.
Hwan Keun KimCenter for Infectious Diseases, Department of Microbiology and Immunology, Stony Brook University, Stony Brook, NY 11794, USA.ORCID 0000-0003-2095-9705
Stony Brook University · US

Funding

Rickettsia conorii transposon mutagenesis and Spotted Fever pathogenesisR21AI144136 · NIAID · UNIVERSITY OF CHICAGO · PI KIM, HWAN KEUN · 2019 to 2020
$442k
NIAID NIH HHS R21 AI144136
6 · The paper itself

Abstract

Rickettsia amblyommatis belongs to the spotted fever group of Rickettsia and infects Amblyomma americanum (Lone Star ticks) for transmission to offspring and mammals. Historically, the geographic range of A. americanum was restricted to the southeastern USA. However, recent tick surveys identified the progressive northward invasion of A. americanum, contributing to the increased number of patients with febrile illnesses of unknown etiology after a tick bite in the northeastern USA. While serological evidence strongly suggests that patients are infected with R. amblyommatis, the virulence potential of R. amblyommatis is not well established. Here, we performed a bioinformatic analysis of three genome sequences of R. amblyommatis and identified the presence of multiple putative virulence genes whose products are implicated for spotted fever pathogenesis. Similar to other pathogenic spotted fever rickettsiae, R. amblyommatis replicated intracellularly within the cytoplasm of tissue culture cells. Interestingly, R. amblyommatis displayed defective attachment to microvascular endothelial cells. The attachment defect and slow growth rate of R. amblyommatis required relatively high intravenous infectious doses to produce dose-dependent morbidity and mortality in C3H mice. In summary, our results corroborate clinical evidence that R. amblyommatis can cause mild disease manifestation in some patients.

Indexed as

AnimalsCell LineChlorocebus aethiopsDisease Models, AnimalEndothelial CellsGenome, BacterialGenomicsHumansMiceMice, Inbred C3HRickettsiaSpotted Fever Group RickettsiosisVero CellsVirulenceAmblyomma americanumanimal infection modelendothelial cellpathogenesisRickettsia amblyommatisspotted fever

Identifiers

PMID33908603
PMCPMC8110513
OpenAlexW3157587302

What OpenQuestion holds

Textmetadata
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.