Evidence map›Paper›PMID 19171799›Full record

ArticleAntimicrobial agents and chemotherapy2009

A novel gene, erm(41), confers inducible macrolide resistance to clinical isolates of Mycobacterium abscessus but is absent from Mycobacterium chelonae.

Kevin A Nash, Barbara A Brown-Elliott, Richard J Wallace

Open access · greenAbstract read
In one paragraph

Article in Antimicrobial agents and chemotherapy, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 327 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
327citing papers in PubMed, 6 pooled it
11.3field-weighted citation impact, top 1% 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

327 citing papers in PubMed, 6 syntheses or guidelines pooled it, 637 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Treatment of Nontuberculous Mycobacterial Pulmonary Disease: An Official ATS/ERS/ESCMID/IDSA Clinical Practice Guideline.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2020
    Guideline
  5. Guideline
  6. Pooled it
  7. Article
  8. Article
  9. Utility of RGM medium for recovery ofIranian journal of microbiology · 2026
    Article
  10. CRISPRi-mediatedAntimicrobial agents and chemotherapy · 2026
    Article
  11. Article
  12. Journal of bacteriology · 2026
    Review
  13. The Role of β-Lactam Antibiotics in Treating Mycobacterium abscessus: From Laboratory Insights to Clinical Applications and the Case for Clinical Trials.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2026
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. TheMicrobiology spectrum · 2026
    Article
  19. Article
  20. Challenges in the Diagnosis and Treatment of Mycobacterium abscessus Infections.Revista da Sociedade Brasileira de Medicina Tropical · 2026
    Review

267 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

3 authors at 2 institutions in 1 country.

Kevin A NashDepartment of Pathology and Laboratory Medicine, Saban Research Institute of Childrens Hospital Los Angeles, Los Angeles, California 90027, USA. kanash@usc.edu
Barbara A Brown-Elliott
Richard J Wallace
The University of Texas Health Science Center at Tyler · USChildren's Hospital of Los Angeles · US

Funding

Mechanisms of Macrolide Resistance in MycobacteriaR01AI052291 · NIAID · CHILDREN'S HOSPITAL OF LOS ANGELES · PI NASH, KEVIN A · 2003 to 2010
$1.4M
Mechanisms of macrolide resistance in mycobacteriaR56AI052291 · NIAID · CHILDREN'S HOSPITAL OF LOS ANGELES · PI NASH, KEVIN A · 2006 to 2006
$276k
NIAID NIH HHS R01 AI052291NIAID NIH HHS R01-AI052291NIAID NIH HHS R56 AI052291
6 · The paper itself

Abstract

Mycobacterium abscessus infections tend to respond poorly to macrolide-based chemotherapy, even though the organisms appear to be susceptible to clarithromycin. Circumstantial evidence suggested that at least some M. abscessus isolates might be inducibly resistant to macrolides. Thus, the purpose of this study was to investigate the macrolide phenotype of M. abscessus clinical isolates. Inducible resistance to clarithromycin (MIC > 32 microg/ml) was found for 7 of 10 clinical isolates of M. abscessus previously considered susceptible; the remaining 3 isolates were deemed to be susceptible (MIC <or= 0.5 microg/ml). Inducible resistance was conferred by a novel erm gene, erm(41), which was present in all 10 isolates and in an isolate of Mycobacterium bolletii (M. abscessus type II). However, the erm(41) alleles were nonfunctional in the three susceptible M. abscessus isolates. No evidence of erm(41) was found in Mycobacterium chelonae, and an isolate of Mycobacterium massiliense appeared to be an erm(41) deletion mutant. Expression of erm(41) in M. abscessus conferred resistance to clarithromycin and erythromycin and the ketolide HMR3004. However, this species was found to be intrinsically resistant, independent of erm(41), to clindamycin, quinupristin (streptogramin B), and telithromycin. The ability to confer resistance to clindamycin and telithromycin, but not quinupristin, was demonstrated by expressing erm(41) in Maycobacterium smegmatis. Exposure of M. abscessus to the macrolide-lincosamide-streptogramin B-ketolide agents increased the levels of erm(41) mRNA 23- to 250-fold within 24 h. The inducible macrolide resistance phenotype of some M. abscessus isolates may explain the lack of efficacy of macrolide-based chemotherapy against this organism.

Indexed as

Amino Acid SequenceClarithromycinDrug Resistance, BacterialHumansMacrolidesMethyltransferasesMicrobial Sensitivity TestsMolecular Sequence DataMycobacterium chelonaeNontuberculous MycobacteriaPolymerase Chain ReactionRNAClarithromycinMacrolidesMethyltransferasesRNArRNA (adenosine-O-2'-)methyltransferase

Identifiers

PMID19171799
PMCPMC2663066
OpenAlexW2162625328

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.