Travel Health Evidence

Evidence map

Travellers diarrhoea: what the evidence base looks like

7 publications, 0 of them trials and 7 syntheses. This page describes the shape of that literature rather than summarising its conclusions.

Updated 3 min read 7 citations

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What the evidence on travellers diarrhoea is made of Of 7 publications on this topic, the breakdown by study type: 7 meta-analysis. 7meta-analysis (7)
7 publications, by study type. Volume is not strength — the same count can be a settled question or a pile of commentary, and which one it is depends almost entirely on this breakdown. Harvested from PubMed and Crossref; publication type as recorded by the source.

What this literature is made of

The synthesis is ahead of the primary literature here — reviews and meta-analyses drawing on a modest number of underlying studies. Treat confident conclusions with the caution the sample size deserves.

The distinction that matters most is between synthesis and primary research. A meta-analysis pools trials and is the closest thing to a settled answer a field produces. A narrative review is one group's reading of the same material and can be selective without being dishonest. Counting them together, which most citation counts do, obscures exactly the thing you want to know.

When the travellers diarrhoea literature was published Publication years for the 7 papers on this topic, grouped into bands from before 2015 through to 2023 onwards. Before 20153 papers2020-20222 papers2023 onwards1 papers2015-20191 papers
Mostly settled or quiet. The most recent paper here is from 2023, which usually means either a closed question or one that has fallen out of fashion. Publication years as recorded by PubMed and Crossref.

How this page is built

Everything above is computed from the citations this site harvested from PubMed and Crossref, not written by hand. When the weekly harvest finds a new paper on this topic, these counts change and the characterisation changes with them. That is the point: a hand-written claim about how strong an evidence base is starts decaying the day it is written.

Publication type is taken as the source records it. That is imperfect — journals label inconsistently, and a paper indexed as a "review" may be a systematic one — so treat the bands as approximate. They are accurate enough to distinguish a trial literature from a commentary literature, which is the distinction that matters.

Empty single-aisle airliner cabin looking down rows of seats towards the rear
Long periods seated with the knees bent are the main reason immobility is linked with travel-related clots. Kevin Dooley · CC BY 2.0 · Wikimedia Commons

The strongest work on this topic

Ordered by study design first, then recency. The full set is listed in the references below.

  1. Orally Ingested Probiotic, Prebiotic, and Synbiotic Interventions as Countermeasures for Gastrointestinal Tract Infections in Nonelderly Adults: A Systematic Review and Meta-Analysis — Fagnant HS, Isidean SD, Wilson L et al., 2023, meta-analysis
  2. Probiotics and rifaximin for the prevention of travelers' diarrhea: A systematic review and network meta-analysis — Fan H, Gao L, Yin Z et al., 2022, meta-analysis
  3. Systematic Review and Meta-Analyses Assessment of the Clinical Efficacy of Bismuth Subsalicylate for Prevention and Treatment of Infectious Diarrhea — Brum JM, Gibb RD, Ramsey DL et al., 2021, meta-analysis
  4. Prophylactic efficacy of probiotics on travelers' diarrhea: an adaptive meta-analysis of randomized controlled trials — Bae JM, 2018, meta-analysis
  5. Effectiveness of rifaximin and fluoroquinolones in preventing travelers' diarrhea (TD): a systematic review and meta-analysis — Alajbegovic S, Sanders JW, Atherly DE et al., 2012, meta-analysis
  6. Efficacy of rifaximin in prevention of travelers' diarrhea: a meta-analysis of randomized, double-blind, placebo-controlled trials — Hu Y, Ren J, Zhan M et al., 2012, meta-analysis
  7. Incidence, etiology, and impact of diarrhea among long-term travelers (US military and similar populations): a systematic review — Riddle MS, Sanders JW, Putnam SD et al., 2006, meta-analysis
How much research is there on travellers diarrhoea?
7 publications are indexed here, of which 0 are trials and 7 are syntheses.
Does more research mean a stronger conclusion?
No. Composition matters more than volume — five randomised trials support a claim far better than fifty commentaries, and citation counts do not distinguish between them.
How current is this?
The most recent paper indexed here is from 2023. The set is refreshed weekly from PubMed and Crossref.
Why does this page not tell me the answer?
Because summarising a literature into a conclusion requires reading it, and doing that automatically is how confident nonsense gets published. This page tells you how much weight a conclusion could bear; the articles on this site do the interpreting.

References

Every citation below links to the original peer-reviewed record on PubMed or via DOI. Nothing here is a substitute for medical advice.

  1. Orally Ingested Probiotic, Prebiotic, and Synbiotic Interventions as Countermeasures for Gastrointestinal Tract Infections in Nonelderly Adults: A Systematic Review and Meta-Analysis Fagnant HS, Isidean SD, Wilson L, et al. · Advances in nutrition (Bethesda, Md.) · 2023 · Meta-analysis DOIPubMed 36822240Full text
  2. Probiotics and rifaximin for the prevention of travelers' diarrhea: A systematic review and network meta-analysis Fan H, Gao L, Yin Z, et al. · Medicine · 2022 · Meta-analysis DOIPubMed 36221413Full text
  3. Systematic Review and Meta-Analyses Assessment of the Clinical Efficacy of Bismuth Subsalicylate for Prevention and Treatment of Infectious Diarrhea Brum JM, Gibb RD, Ramsey DL, et al. · Digestive diseases and sciences · 2021 · Meta-analysis DOIPubMed 32772204Full text
  4. Prophylactic efficacy of probiotics on travelers' diarrhea: an adaptive meta-analysis of randomized controlled trials Bae JM · Epidemiology and health · 2018 · Meta-analysis DOIPubMed 30189723Full text
  5. Efficacy of rifaximin in prevention of travelers' diarrhea: a meta-analysis of randomized, double-blind, placebo-controlled trials Hu Y, Ren J, Zhan M, et al. · Journal of travel medicine · 2012 · Meta-analysis DOIPubMed 23379704
  6. Effectiveness of rifaximin and fluoroquinolones in preventing travelers' diarrhea (TD): a systematic review and meta-analysis Alajbegovic S, Sanders JW, Atherly DE, et al. · Systematic reviews · 2012 · Meta-analysis DOIPubMed 22929178Full text
  7. Incidence, etiology, and impact of diarrhea among long-term travelers (US military and similar populations): a systematic review Riddle MS, Sanders JW, Putnam SD, et al. · The American journal of tropical medicine and hygiene · 2006 · Meta-analysis PubMed 16687698