Evidence map›Paper›PMID 21282411›Full record

ArticleInfection and immunity2011

Murine immune response to a chronic Staphylococcus aureus biofilm infection.

Ranjani Prabhakara, Janette M Harro, Jeff G Leid, Megan Harris, Mark E Shirtliff

Registry-linked trialOpen access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03132246 (Early Determination of Biofilm Formation on Orthopaedic Devices), which is not on this map. Cited by 71 papers.

0numbers the graph read from it
0cells of the map it votes in
71citing 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.

NCT03132246 completednot on this mapstarted 2014, after this paper: background citation

Early Determination of Biofilm Formation on Orthopaedic Devices

TypeobservationalSponsorUniversity of Maryland, BaltimoreRan2014 to 2018Enrolled260ConditionsOpen Reduction and Internal Fixation of Extremity FracturesArmsBlood draws
3 · Its place in the literature

Who cites it

71 citing papers in PubMed, 121 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Review
  5. Review
  6. Scaffold vaccination for prevention of orthopedic device infection.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  7. Nanozyme-Based Strategies against Bone Infection.Research (Washington, D.C.) · 2025
    Review
  8. Article
  9. Article
  10. Review
  11. Article
  12. Review
  13. Review
  14. Immune Response to Persistent Staphyloccocus Aureus Periprosthetic Joint Infection in a Mouse Tibial Implant Model.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2022
    Article
  15. Article
  16. Article
  17. Diagnostics for Wound Infections.Advances in wound care · 2021
    Review
  18. Article
  19. Article
  20. Article

11 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

5 authors at 2 institutions in 1 country.

Ranjani Prabhakaraepartment of Microbial Pathogenesis, Dental School, University of Maryland, Baltimore, Maryland, USA.
Janette M Harro
Jeff G Leid
Megan Harris
Mark E Shirtliff
University of Maryland, Baltimore · USNorthern Arizona University · US

Funding

Staphylococcus aureus biofilms: in vitro and in vivo studiesR01AI069568 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI SHIRTLIFF, MARK E · 2007 to 2011
$2.1M
NIAID NIH HHS AI69568-01A2NIAID NIH HHS R01 AI069568
6 · The paper itself

Abstract

Staphylococcus aureus has reemerged as an important human pathogen in recent decades. Although many infections caused by this microbial species persist through a biofilm mode of growth, little is known about how the host's adaptive immune system responds to these biofilm infections. In this study, S. aureus cells adhered to pins in culture and were subsequently inserted into the tibiae of C57BL/6 mice, with an infecting dose of 2 × 10⁵ CFU. This model was utilized to determine local cytokine levels, antibody (Ab) function, and T cell populations at multiple time points throughout infection. Like human hosts, S. aureus implant infection was chronic and remained localized in 100% of C57BL/6 mice at a consistent level of approximately 10(7) CFU/gram bone tissue after day 7. This infection persisted locally for >49 days and was recalcitrant to clearance by the host immune response and antimicrobial therapy. Local inflammatory cytokines of the Th1 (interleukin-2 [IL-2], IL-12 p70, tumor necrosis factor alpha [TNF-α], and IL-1β) and Th17 (IL-6 and IL-17) responses were upregulated throughout the infection, except IL-12 p70, which dwindled late in the infection. In addition, Th1 Ab subtypes against a biofilm antigen (SA0486) were upregulated early in the infection, while Th2 Abs and anti-inflammatory regulatory T cells (Tregs) were not upregulated until later. These results indicate that early Th1 and Th17 inflammatory responses and downregulated Th2 and Treg responses occur during the development of a chronic biofilm implant infection. This unrestrained inflammatory response may cause tissue damage, thereby enabling S. aureus to attach and thrive in a biofilm mode of growth.

Indexed as

AnimalsBiofilmsBone NailsChronic DiseaseCytokinesFlow CytometryImmunoglobulin GMiceMice, Inbred C57BLProsthesis-Related InfectionsStaphylococcal InfectionsStaphylococcus aureusT-LymphocytesCytokinesImmunoglobulin G

Identifiers

PMID21282411
PMCPMC3067568
OpenAlexW2122568531

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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.