Evidence map›Paper›PMID 23114772›Full record

ArticleAntimicrobial agents and chemotherapy2013

Rapid isolation and susceptibility testing of Leptospira spp. using a new solid medium, LVW agar.

Vanaporn Wuthiekanun, Premjit Amornchai, Daniel H Paris, Sayan Langla, Janjira Thaipadunpanit, Wirongrong Chierakul, Lee D Smythe, Nicholas J White, Nicholas P J Day, Direk Limmathurotsakul and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Antimicrobial agents and chemotherapy, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
1.6field-weighted citation impact, top 20% 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

19 citing papers in PubMed, 42 citations in OpenAlex.

  1. Review
  2. Antibacterial Activity of CrudeActa medica Philippina · 2024
    Article
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  5. Article
  6. Survival ofThe American journal of tropical medicine and hygiene · 2020
    Article
  7. Article
  8. Leptospiral Culture without 5'-Fluorouracil Revealed ImprovedInternational journal of environmental research and public health · 2020
    Article
  9. Antimicrobial Susceptibility Testing ofThe American journal of tropical medicine and hygiene · 2019
    Article
  10. Article
  11. Antimicrobial Resistance inMicrobiology spectrum · 2018
    Review
  12. Quality controls for antimicrobial disk diffusion testing on Leptospira Vanaporn Wuthiekanun agar.Transactions of the Royal Society of Tropical Medicine and Hygiene · 2016
    Article
  13. Review
  14. Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. 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

11 authors at 4 institutions in 3 countries.

Vanaporn WuthiekanunMahidol-Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand.
Premjit Amornchai
Daniel H Paris
Sayan Langla
Janjira Thaipadunpanit
Wirongrong Chierakul
Lee D Smythe
Nicholas J White
Nicholas P J Day
Direk Limmathurotsakul
Sharon J Peacock
Mahidol Oxford Tropical Medicine Research Unit · THMahidol University · THUniversity of Oxford · GBQueensland Health · AU

Funding

Wellcome Trust 089275Wellcome Trust 093956
6 · The paper itself

Abstract

Pathogenic Leptospira spp., the causative agents of leptospirosis, are slow-growing Gram-negative spirochetes. Isolation of Leptospira from clinical samples and testing of antimicrobial susceptibility are difficult and time-consuming. Here, we describe the development of a new solid medium that facilitates more-rapid growth of Leptospira spp. and the use of this medium to evaluate the Etest's performance in determining antimicrobial MICs to drugs in common use for leptospirosis. The medium was developed by evaluating the effects of numerous factors on the growth rate of Leptospira interrogans strain NR-20157. These included the type of base agar, the concentration of rabbit serum (RS), and the concentration and duration of CO(2) incubation during the initial period of culture. The highest growth rate of NR-20157 was achieved using a Noble agar base supplemented with 10% RS (named LVW agar), with an initial incubation at 30°C in 5% CO(2) for 2 days prior to continuous culture in air at 30°C. These conditions were used to develop the Etest for three species, L. interrogans (NR-20161), L. kirschnerii (NR-20327), and L. borgpetersenii (NR-20151). The MICs were read on day 7 for all samples. The Etest was then performed on 109 isolates of pathogenic Leptospira spp. The MIC(90) values for penicillin G, doxycycline, cefotaxime, ceftriaxone, and chloramphenicol were 0.64 units/ml and 0.19, 0.047, 0.5, and 2 μg/ml, respectively. The use of LVW agar, which enables rapid growth, isolation of single colonies, and simple antimicrobial susceptibility testing for Leptospira spp., provides an opportunity for new areas of fundamental and applied research.

Indexed as

AgarAnimalsAnti-Bacterial AgentsCarbon DioxideColony Count, MicrobialCulture MediaHumansLeptospira interrogansLeptospirosisMicrobial Sensitivity TestsRabbitsAgarAnti-Bacterial AgentsCarbon DioxideCulture Media

Identifiers

PMID23114772
PMCPMC3535913
OpenAlexW2106376805

What OpenQuestion holds

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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.