Evidence map›Paper›PMID 27402521›Full record

ArticleThe American journal of tropical medicine and hygiene2016

Redefining Gold Standard Testing for Diagnosing Leptospirosis: Further Evidence from a Well-Characterized, Flood-Related Outbreak in Sri Lanka.

Suneth B Agampodi, Niroshan J Dahanayaka, Karsten Nöckler, Anne Mayer-Scholl, Joseph M Vinetz

Open access · bronzeAbstract read
In one paragraph

Article in The American journal of tropical medicine and hygiene, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 4 pooled it
3.7field-weighted citation impact, top 8% 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

27 citing papers in PubMed, 4 syntheses or guidelines pooled it, 39 citations in OpenAlex.

  1. Pooled it
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  3. Nucleic acid and antigen detection tests for leptospirosis.The Cochrane database of systematic reviews · 2019
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  13. Serologically Confirmed Human Leptospirosis in Colombia, 2015-2020.The American journal of tropical medicine and hygiene · 2024
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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 at 3 institutions in 3 countries.

Suneth B AgampodiTropical Disease Research Unit (TDRU), Rajarata University of Sri Lanka, Sri Lanka.
Niroshan J DahanayakaDepartment of Medicine, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Sri Lanka.
Karsten NöcklerFederal Institute for Risk Assessment, Berlin, Germany.
Anne Mayer-SchollFederal Institute for Risk Assessment, Berlin, Germany.
Joseph M VinetzDivision of Infectious Diseases, Department of Medicine, University of California, San Diego, California.
Federal Institute for Risk Assessment · DERajarata University of Sri Lanka · LKUniversity of California System · US

Funding

Predicting Risk of Human Leptospiros by Environmental SurveillanceR01AI108276 · NIAID · YALE UNIVERSITY · PI VINETZ, JOSEPH M. · 2013 to 2017
$3.6M
Draft Scientific ComponentU19AI115658 · NIAID · YALE UNIVERSITY · PI AGAMPODI, SUNETH BUDDHIKA · 2015 to 2019
$1.9M
Patient-Oriented Research in Tropical Infectious DiseasesK24AI068903 · NIAID · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI VINETZ, JOSEPH M. · 2006 to 2015
$1.5M
NIAID NIH HHS K24 AI068903NIAID NIH HHS R01 AI108276NIAID NIH HHS U19 AI115658
6 · The paper itself

Abstract

A gap in the leptospirosis field remains the lack of well-characterized sample collections that allow for comparison of new methods to standard ones. In the context of a flood-related outbreak of leptospirosis evaluated in Anuradhapura, Sri Lanka, a specimen bank was obtained with detailed metadata accompanied by gold standard diagnostic test results. Blood samples collected on admission and 14 days later from suspected cases of leptospirosis were tested using microscopic agglutination test (MAT) (17 serovars), an in-house enzyme-linked immunosorbent assay (ELISA) using a locally obtained strain of Leptospira kirschneri as sonicated antigen, a commercially available ELISA based on sonicated Leptospira biflexa, and a quantitative polymerase chain reaction (qPCR) assay targeting the pathogenic Leptospira-specific 16S rRNA gene. Of 62 patients presenting within the first 2 days of illness, 31 had confirmed leptospirosis based either on paired-sample MAT or qPCR. During the acute phase, qPCR was most sensitive, detecting 74% of definitively diagnosed cases; immunoglobulin G (IgG) ELISA (in-house), IgG ELISA (commercial), and MAT had sensitivities of 35.5%, 12.0%, and 22.6%, respectively, in detecting definitively diagnosed cases using acute phase serum. Of 40 patients with paired sera, 10 were qPCR positive. Of these, five samples were negative by paired-sample MAT. Of the 11 MAT-positive samples, only five were detected using qPCR confirming that both tests are needed for maximal sensitivity. Regional leptospiral serovar-specific IgG ELISA was superior to MAT. Knowing the regionally dominant serovars improves serological sensitivity in the analysis of acute specimens by ELISA, but qPCR was most sensitive in this patient population.

Indexed as

AdultAgglutination TestsCross-Sectional StudiesDisease OutbreaksFemaleFoodborne DiseasesHumansLeptospirosisMalePolymerase Chain ReactionSri Lanka

Identifiers

PMID27402521
PMCPMC5014254
OpenAlexW2472494001

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.