Evidence map›Paper›PMID 19433566›Full record

ArticleAntimicrobial agents and chemotherapy2009

Resistance selection studies comparing the activity of razupenem (PTZ601) to vancomycin and linezolid against eight methicillin-resistant and two methicillin-susceptible Staphylococcus aureus strains.

Catherine Clark, Klaudia Kosowska-Shick, Pamela McGhee, Bonifacio Dewasse, Linda Beachel, Peter C Appelbaum

Abstract 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 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing 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

9 citing papers in PubMed.

  1. Lack of Spontaneous and Adaptive Resistance Development inAntibiotics (Basel, Switzerland) · 2025
    Article
  2. Review
  3. New Quinone Antibiotics against Methicillin-ResistantAntibiotics (Basel, Switzerland) · 2021
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. 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.

Catherine ClarkDepartment of Pathology, Hershey Medical Center, Hershey, PA 17033, USA.
Klaudia Kosowska-Shick
Pamela McGhee
Bonifacio Dewasse
Linda Beachel
Peter C Appelbaum

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Multistep and single-step resistance selection studies were performed with razupenem, linezolid, and vancomycin against 10 methicillin (meticillin)-resistant and -susceptible Staphylococcus aureus strains. After 20 daily subcultures, razupenem yielded only clones with MICs of >4 microg/ml in one strain (8 microg/ml) whose parent's MIC was already 4 microg/ml. After 18 to 49 passages in 6/10 strains, razupenem MICs rose from 0.016 to 2 microg/ml (parents) to 0.125 to 8 microg/ml (with clones stable after 10 drug-free subcultures). Single-step mutant selection frequencies were similarly low for razupenem and comparators.

Indexed as

AcetamidesAnti-Bacterial AgentsDrug Resistance, Multiple, BacterialLinezolidMethicillinMethicillin-Resistant Staphylococcus aureusMicrobial Sensitivity TestsOxazolidinonesStaphylococcus aureusVancomycinAcetamidesAnti-Bacterial AgentsLinezolidMethicillinOxazolidinonesVancomycin

Identifiers

PMID19433566
PMCPMC2704702

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.