Evidence map›Paper›PMID 23964935›Full record

ArticleThe New England journal of medicine2013

Eastern equine encephalitis in Latin America.

Jean-Paul Carrera, Naomi Forrester, Eryu Wang, Amy Y Vittor, Andrew D Haddow, Sandra López-Vergès, Ivan Abadía, Elizabeth Castaño, Nestor Sosa, Carmen Báez and 10 more

Open access · bronzeAbstract readCase Reports
In one paragraph

Article in The New England journal of medicine, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed
7.8field-weighted citation impact, top 3% 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

79 citing papers in PubMed, 126 citations in OpenAlex.

  1. Trial
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  8. Development ofEmerging microbes & infections · 2025
    Article
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  11. Venezuelan Equine Encephalitis, Peruvian Amazon, 2020.Emerging infectious diseases · 2025
    Article
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19 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

20 authors at 6 institutions in 5 countries.

Jean-Paul CarreraDepartment of Research in Virology and Biotechnology, Gorgas Memorial Institute of Health Studies, Panama City, Panama.
Naomi Forrester
Eryu Wang
Amy Y Vittor
Andrew D Haddow
Sandra López-Vergès
Ivan Abadía
Elizabeth Castaño
Nestor Sosa
Carmen Báez
Dora Estripeaut
Yamilka Díaz
Davis Beltrán
Julio Cisneros
Hector G Cedeño
Amelia P Travassos da Rosa
Humberto Hernandez
Alex O Martínez-Torres
Robert B Tesh
Scott C Weaver
Hospital del Niño · PAUniversidad de Panamá · PADirection Générale de la Météorologie · BFMinistry of Agriculture and Rural Development · PLMinistry of Health of the Russian Federation · RUUniversity of Pennsylvania · US

Funding

WRCE Nonhuman Primate CoreU54AI057156 · NIAID · UNIVERSITY OF TEXAS MEDICAL BR GALVESTON · PI WALKER, DAVID H · 2003 to 2013
$102.6M
NIAID NIH HHS HHSN272201000040CNIAID NIH HHS HHSN272201000040INIAID NIH HHS U54 AI057156NIAID NIH HHS U54-AI057156PHS HHS HHSN27200004/DO4PHS HHS HHSN27220100004OI
6 · The paper itself

Abstract

backgroundThe eastern equine encephalitis (EEE) and Venezuelan equine encephalitis (VEE) viruses are pathogens that infect humans and horses in the Americas. Outbreaks of neurologic disease in humans and horses were reported in Panama from May through early August 2010.

methodsWe performed antibody assays and tests to detect viral RNA and isolate the viruses in serum samples from hospitalized patients. Additional cases were identified with enhanced surveillance.

resultsA total of 19 patients were hospitalized for encephalitis. Among them, 7 had confirmed EEE, 3 had VEE, and 1 was infected with both viruses; 3 patients died, 1 of whom had confirmed VEE. The clinical findings for patients with EEE included brain lesions, seizures that evolved to status epilepticus, and neurologic sequelae. An additional 99 suspected or probable cases of alphavirus infection were detected during active surveillance. In total, 13 cases were confirmed as EEE, along with 11 cases of VEE and 1 case of dual infection. A total of 50 cases in horses were confirmed as EEE and 8 as VEE; mixed etiologic factors were associated with 11 cases in horses. Phylogenetic analyses of isolates from 2 cases of equine infection with the EEE virus and 1 case of human infection with the VEE virus indicated that the viruses were of enzootic lineages previously identified in Panama rather than new introductions.

conclusionsCases of EEE in humans in Latin America may be the result of ecologic changes that increased human contact with enzootic transmission cycles, genetic changes in EEE viral strains that resulted in increased human virulence, or an altered host range. (Funded by the National Institutes of Health and the Secretaría Nacional de Ciencia, Tecnología e Innovación, Panama.).

Indexed as

Disease OutbreaksEncephalitis Virus, Eastern EquineEncephalitis Virus, Venezuelan EquineEncephalomyelitis, Eastern EquineEncephalomyelitis, Venezuelan EquineAdolescentAnimalsAntibodies, ViralChildChild, PreschoolFatal OutcomeFemaleHorse DiseasesHorsesHumansInfantAntibodies, ViralRNA, Viral

Identifiers

PMID23964935
PMCPMC3839813
OpenAlexW2136137139

What OpenQuestion holds

Textmetadata
LicenceTDM
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.