Evidence map›Paper›PMID 19261786›Full record

ArticleJournal of clinical microbiology2009

Strain-dependent variation in 18S ribosomal DNA Copy numbers in Aspergillus fumigatus.

M L Herrera, A C Vallor, J A Gelfond, T F Patterson, B L Wickes

Abstract read
In one paragraph

Article in Journal of clinical microbiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed
–field-weighted citation impact
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

81 citing papers in PubMed.

  1. Article
  2. Biomarkers in the Diagnosis of Aspergillosis.Journal of fungi (Basel, Switzerland) · 2026
    Review
  3. Article
  4. The Role ofInternational journal of molecular sciences · 2025
    Article
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  7. Article
  8. Article
  9. Review
  10. Antimicrobial agents and chemotherapy · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Porcine fungal mock community analyses: Implications for mycobiome investigations.Frontiers in cellular and infection microbiology · 2023
    Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Review
  20. Article

21 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.

M L HerreraDepartment of Microbiology and Immunology, the University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229-3900, USA.
A C Vallor
J A Gelfond
T F Patterson
B L Wickes

Funding

NIAID NIH HHS N01 AI030041OCPHP CDC HHS PR054228
6 · The paper itself

Abstract

Enumerating Aspergillus fumigatus CFU can be challenging since CFU determination by plate count can be difficult. CFU determination by quantitative real-time PCR (qPCR), however, is becoming increasingly common and usually relies on detecting one of the subunits of the multicopy rRNA genes. This study was undertaken to determine if ribosomal DNA (rDNA) copy number was constant or variable among different A. fumigatus isolates. FKS1 was used as a single-copy control gene and was validated against single-copy (pyrG and ARG4) and multicopy (arsC) controls. The copy numbers of the 18S rDNA subunit were then determined for a variety of isolates and were found to vary with the strain, from 38 to 91 copies per genome. Investigation of the stability of the 18S rDNA copy number after exposure to a number of different environmental and growth conditions revealed that the copy number was stable, varying less than one copy across all conditions, including in isolates recovered from an animal model. These results suggest that while the ribosomal genes are excellent targets for enumeration by qPCR, the copy number should be determined prior to using them as targets for quantitative analysis.

Indexed as

Gene DosageGenes, rRNAAnimalsAspergillus fumigatusDNA, RibosomalRNA, Ribosomal, 18SDNA, RibosomalRNA, Ribosomal, 18S

Identifiers

PMID19261786
PMCPMC2681831

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Registered trials

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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.