Evidence map›Paper›PMID 31000763›Full record

ArticleScientific reports2019

Chlamydia pecorum prevalence in South Australian koala (Phascolarctos cinereus) populations: Identification and modelling of a population free from infection.

Jessica Fabijan, Charles Caraguel, Martina Jelocnik, Adam Polkinghorne, Wayne S J Boardman, Elisa Nishimoto, Greg Johnsson, Robyn Molsher, Lucy Woolford, Peter Timms and 4 more

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 11% 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, 1 synthesis or guideline pooled it, 43 citations in OpenAlex.

  1. Current status and future directions ofFrontiers in veterinary science · 2026
    Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Chlamydiosis in Animals.Animals : an open access journal from MDPI · 2024
    Review
  11. Epidemiology, Transmission Mode, and Pathogenesis ofAnimals : an open access journal from MDPI · 2024
    Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Health and Diseases of Koalas.Animals : an open access journal from MDPI · 2022
    Article
  19. 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

14 authors at 3 institutions in 1 country.

Jessica FabijanSchool of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, 5371, South Australia, Australia. jessica.fabijan@adelaide.edu.au.
Charles CaraguelSchool of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, 5371, South Australia, Australia.
Martina JelocnikFaculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, 4558, Queensland, Australia.
Adam PolkinghorneFaculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, 4558, Queensland, Australia.
Wayne S J BoardmanSchool of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, 5371, South Australia, Australia.
Elisa NishimotoKangaroo Island Veterinary Clinic, Kingscote, 5223, South Australia, Australia.
Greg JohnssonKangaroo Island Veterinary Clinic, Kingscote, 5223, South Australia, Australia.
Robyn MolsherDepartment for Environment and Water, Adelaide, 5000, South Australia, Australia.
Lucy WoolfordSchool of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, 5371, South Australia, Australia.
Peter TimmsFaculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, 4558, Queensland, Australia.
Greg SimmonsSchool of Veterinary Sciences, The University of Queensland, Gatton, 4343, Queensland, Australia.
Farhid HemmatzadehSchool of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, 5371, South Australia, Australia.
Darren J TrottSchool of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, 5371, South Australia, Australia.
Natasha SpeightSchool of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, 5371, South Australia, Australia.
University of Adelaide · AUUniversity of the Sunshine Coast · AUUniversity of Queensland · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Chlamydia pecorum is an established and prevalent infection that produces severe clinical disease in many koala populations, contributing to dramatic population declines. In wild South Australian koala populations, C. pecorum occurrence and distribution is unknown. Here, C. pecorum-specific real-time quantitative PCR (qPCR) was applied to ocular and urogenital swabs from targeted surveys of wild koalas from the mainland Mount Lofty Ranges (MLR) (n = 75) and Kangaroo Island (KI) (n = 170) populations. Historical data from 13,081 KI koalas (1997-2018) provided additional evidence for assessing the absence of C. pecorum infection. In the MLR population, 46.7% (CI: 35.1-58.6%) of koalas were C. pecorum positive by qPCR but only 4% had grade 3 clinical disease. MLR koala fertility was significantly reduced by C. pecorum infection; all reproductively active females (n = 16) were C. pecorum negative, whereas 85.2% of inactive females (n = 23) were positive (P < 0.001). KI koalas were C. pecorum negative and the population was demonstrated to be free of C. pecorum infection with 95% confidence. C. pecorum is a real threat for the sustainability of the koala and KI is possibly the last isolated, large C. pecorum-free population remaining in Australia. These koalas could provide a safeguard against this serious disease threat to an iconic Australian species.

Indexed as

PhascolarctidaeAnimalsChlamydiaChlamydia InfectionsEye Infections, BacterialFemaleFemale Urogenital DiseasesFertilityMaleModels, BiologicalPolymerase Chain ReactionPrevalenceSouth Australia

Identifiers

PMID31000763
PMCPMC6472425
OpenAlexW2938595881

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.