Evidence map›Paper›PMID 26822522›Full record

SynthesisBMC infectious diseases2016

Revisiting typhoid fever surveillance in low and middle income countries: lessons from systematic literature review of population-based longitudinal studies.

Vittal Mogasale, Vijayalaxmi V Mogasale, Enusa Ramani, Jung Seok Lee, Ju Yeon Park, Kang Sung Lee, Thomas F Wierzba

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC infectious diseases, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 2 pooled it
–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

34 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Global Typhoid Fever Incidence: A Systematic Review and Meta-analysis.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2019
    Pooled it
  3. Review
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  16. Review on the Recent Advances on Typhoid Vaccine Development and Challenges Ahead.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2020
    Review
  17. Article
  18. Article
  19. Spatial and Temporal Patterns of Typhoid and Paratyphoid Fever Outbreaks: A Worldwide Review, 1990-2018.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2019
    Review
  20. A Multicenter Cost-of-Illness and Long-term Socioeconomic Follow-up Study in the Severe Typhoid Fever in Africa Program: Study Protocol.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2019
    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

7 authors.

Vittal MogasalePolicy and Economic Research Department, International Vaccine Institute, SNU Research Park, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, South Korea. vmogasale@ivi.int.
Vijayalaxmi V MogasaleEpidemiology Department, International Vaccine Institute, Seoul, South Korea. vijivittalmogasale@gmail.com.
Enusa RamaniPolicy and Economic Research Department, International Vaccine Institute, SNU Research Park, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, South Korea. Enusa.Ramani@IVI.INT.
Jung Seok LeePolicy and Economic Research Department, International Vaccine Institute, SNU Research Park, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, South Korea. jslee@ivi.int.
Ju Yeon ParkBiostatistics and Data Management Department, International Vaccine Institute, Seoul, South Korea. JuYeon.Park@IVI.INT.
Kang Sung LeeBiostatistics and Data Management Department, International Vaccine Institute, Seoul, South Korea. KangSungLee@IVI.INT.
Thomas F WierzbaDevelopment and Delivery Unit, International Vaccine Institute, Seoul, South Korea. twierzba@path.org.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe control of typhoid fever being an important public health concern in low and middle income countries, improving typhoid surveillance will help in planning and implementing typhoid control activities such as deployment of new generation Vi conjugate typhoid vaccines.

methodsWe conducted a systematic literature review of longitudinal population-based blood culture-confirmed typhoid fever studies from low and middle income countries published from 1(st) January 1990 to 31(st) December 2013. We quantitatively summarized typhoid fever incidence rates and qualitatively reviewed study methodology that could have influenced rate estimates. We used meta-analysis approach based on random effects model in summarizing the hospitalization rates.

resultsTwenty-two papers presented longitudinal population-based and blood culture-confirmed typhoid fever incidence estimates from 20 distinct sites in low and middle income countries. The reported incidence and hospitalizations rates were heterogeneous as well as the study methodology across the sites. We elucidated how the incidence rates were underestimated in published studies. We summarized six categories of under-estimation biases observed in these studies and presented potential solutions.

conclusionsPublished longitudinal typhoid fever studies in low and middle income countries are geographically clustered and the methodology employed has a potential for underestimation. Future studies should account for these limitations.

Indexed as

Databases, FactualDeveloping CountriesHospitalizationHumansIncidenceLongitudinal StudiesSalmonella typhiTyphoid Fever

Identifiers

PMID26822522
PMCPMC4731936

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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.