Evidence map›Paper›PMID 25629781›Full record

ArticleVector borne and zoonotic diseases (Larchmont, N.Y.)2015

How important are rats as vectors of leptospirosis in the Mekong Delta of Vietnam?

Hoang Kim Loan, Nguyen Van Cuong, Ratree Takhampunya, Bach Tuan Kiet, James Campbell, Lac Ngoc Them, Juliet E Bryant, Bousaraporn Tippayachai, Nguyen Van Hoang, Serge Morand and 2 more

Open access · hybridAbstract read
In one paragraph

Article in Vector borne and zoonotic diseases (Larchmont, N.Y.), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 13% 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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 49 citations in OpenAlex.

  1. Pooled it
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  5. Seroprevalence and carrier status ofIranian journal of veterinary research · 2025
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  9. PathogenicMicroorganisms · 2022
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  10. Prevalence of PathogenicPathogens (Basel, Switzerland) · 2022
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  11. Article
  12. Article
  13. Review
  14. Prevalence of Leptospira Infection in Rodents from Bangladesh.International journal of environmental research and public health · 2019
    Article
  15. The possible zoonotic diseases transferring from pig to human in Vietnam.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2019
    Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. 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

12 authors at 6 institutions in 4 countries.

Hoang Kim Loan1 Institute Pasteur , Ho Chi Minh City, Vietnam .
Nguyen Van Cuong
Ratree Takhampunya
Bach Tuan Kiet
James Campbell
Lac Ngoc Them
Juliet E Bryant
Bousaraporn Tippayachai
Nguyen Van Hoang
Serge Morand
Vo Be Hien
Juan J Carrique-Mas
University of Oxford · GBDepartment of Animal Health · VNInstitut Pasteur · FRArmed Forces Research Institute of Medical Science · THOxford University Clinical Research Unit · VNUniversité de Montpellier · FR

Funding

Wellcome Trust 089276Wellcome Trust WT/093724
6 · The paper itself

Abstract

Leptospirosis is a zoonosis known to be endemic in the Mekong Delta of Vietnam, even though clinical reports are uncommon. We investigated leptospira infection in rats purchased in food markets during the rainy season (October) (n=150), as well as those trapped during the dry season (February-March) (n=125) in the region using RT-PCR for the lipL32 gene, confirmed by 16S rRNA, as well as by the microscopic agglutination test (MAT). Results were compared with the serovar distribution of human cases referred from Ho Chi Minh City hospitals (2004-2012) confirmed by MAT (n=45). The MAT seroprevalence among rats was 18.3%. The highest MAT seroprevalence corresponded, in decreasing order, to: Rattus norvegicus (33.0%), Bandicota indica (26.5%), Rattus tanezumi (24.6%), Rattus exulans (14.3%), and Rattus argentiventer (7.1%). The most prevalent serovars were, in descending order: Javanica (4.6% rats), Lousiana (4.2%), Copenageni (4.2%), Cynopterie (3.7%), Pomona (2.9%), and Icterohaemorrhagiae (2.5%). A total of 16 rats (5.8%) tested positive by RT-PCR. Overall, larger rats tended to have a higher prevalence of detection. There was considerable agreement between MAT and PCR (kappa=0.28 [0.07-0.49]), although significantly more rats were positive by MAT (McNemar 29.9 (p<0.001). MAT prevalence was higher among rats during the rainy season compared with rats in the dry season. There are no current available data on leptospira serovars in humans in the Mekong Delta, although existing studies suggest limited overlapping between human and rat serovars. Further studies should take into account a wider range of potential reservoirs (i.e., dogs, pigs) as well as perform geographically linked co-sampling of humans and animals to establish the main sources of leptospirosis in the region.

Indexed as

Disease VectorsAgglutination TestsAnimalsHumansLeptospiraLeptospirosisMeatPrevalenceRatsReal-Time Polymerase Chain ReactionRNA, Ribosomal, 16SRodent DiseasesSeasonsSeroepidemiologic StudiesVietnamZoonosesRNA, Ribosomal, 16SLeptospirosisMekong Delta, VietnamRats

Identifiers

PMID25629781
PMCPMC4307199
OpenAlexW1482515248

What OpenQuestion holds

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LicenceCC BY
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.