Evidence map›Paper›PMID 35981806›Full record

ArticleBMJ global health2022

Substandard and falsified antibiotics: neglected drivers of antimicrobial resistance?

Guillermo A Zabala, Khonsavath Bellingham, Vayouly Vidhamaly, Phonepasith Boupha, Kem Boutsamay, Paul N Newton, Céline Caillet

Abstract read
In one paragraph

Article in BMJ global health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 1 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

51 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. BMJ paediatrics open · 2026
    Article
  8. Article
  9. Article
  10. Article
  11. Knowledge and Practices on Household Disposal of Unused Antimicrobials in Ho Municipality, Ghana.International journal of environmental research and public health · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  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

7 authors.

Guillermo A ZabalaLao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Medicine Quality Research Group, Laboratory of Microbiology, Mahosot Hospital, Vientiane, Lao People's Democratic Republic.ORCID 0000-0001-8382-7748
Khonsavath BellinghamLao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Medicine Quality Research Group, Laboratory of Microbiology, Mahosot Hospital, Vientiane, Lao People's Democratic Republic.ORCID 0000-0001-6162-2098
Vayouly VidhamalyLao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Medicine Quality Research Group, Laboratory of Microbiology, Mahosot Hospital, Vientiane, Lao People's Democratic Republic.ORCID 0000-0003-1941-8944
Phonepasith BouphaLao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Medicine Quality Research Group, Laboratory of Microbiology, Mahosot Hospital, Vientiane, Lao People's Democratic Republic.ORCID 0000-0002-2094-7512
Kem BoutsamayLao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Medicine Quality Research Group, Laboratory of Microbiology, Mahosot Hospital, Vientiane, Lao People's Democratic Republic.ORCID 0000-0001-8152-0523
Paul N NewtonLao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Medicine Quality Research Group, Laboratory of Microbiology, Mahosot Hospital, Vientiane, Lao People's Democratic Republic.ORCID 0000-0003-0734-2022
Céline CailletLao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Medicine Quality Research Group, Laboratory of Microbiology, Mahosot Hospital, Vientiane, Lao People's Democratic Republic celine.caillet@ndm.ox.ac.uk.ORCID 0000-0002-5554-2603

Funding

Wellcome Trust
6 · The paper itself

Abstract

objectivesAntimicrobial resistance (AMR) is a significant global health threat with substandard and falsified (SF) antibiotics being neglected contributing factors. With their relationships poorly understood, more research is needed in order to determine how interventions to reduce SF antibiotics should be ranked as priorities in national AMR action plans. We assessed the evidence available on the global prevalence of SF antibiotics, examined the quality of the evidence and discussed public health impact. MATERIALS/

methodsWe searched PubMed, Embase, Google and Google Scholar for publications on antibiotic quality up to 31 December 2020. Publications reporting on the prevalence of SF antibiotics were evaluated for quantitative analysis and assessed using the Medicines Quality Assessment Reporting Guidelines.

resultsOf the 10 137 screened publications, 648 were relevant to antibiotic quality. One hundred and six (16.4%) surveys, published between 1992 and 2020 and conducted mainly in low-income and middle-income countries (LMICs) (89.9% (480/534) of the data points), qualified for quantitative analysis. The total number of samples tested for quality in prevalence surveys was 13 555, with a median (Q1-Q3) number of samples per survey of 47 (21-135). Of the 13 555 samples, 2357 (17.4%) failed at least one quality test and the median failure frequency (FF) per survey was 19.6% (7.6%-35.0%). Amoxicillin, sulfamethoxazole-trimethoprim and ciprofloxacin were the most surveyed antibiotics, with FF of 16.1% (355/2208), 26.2% (329/1255) and 10.4% (366/3511), respectively. We identified no SF survey data for antibiotics in the WHO 'Reserve' group. The mean Medicine Quality Assessment Reporting Guidelines score was 11 (95% CI 10.1 to 12.2) out of 26.

conclusionsSF antibiotics are widely spread with higher prevalence in LMICs. The quality of the evidence is poor, and these data are not generalisable that 17.4% of global antibiotic supply is SF. However, the evidence we have suggests that interventions to enhance regulatory, purchasing and financial mechanisms to improve the global antibiotic supply are needed. PROSPERO REGISTRATION NUMBER: CRD42019124988.

Indexed as

Anti-Bacterial AgentsDrug Resistance, BacterialGlobal HealthHumansPovertySurveys and QuestionnairesAnti-Bacterial Agentsmedical microbiologypharmacologypublic Health

Identifiers

PMID35981806
PMCPMC9394205

What OpenQuestion holds

Textmetadata
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.