Evidence map›Paper›PMID 33035474›Full record

Observational studyThe Lancet. Infectious diseases2021

T-cell responses to MERS coronavirus infection in people with occupational exposure to dromedary camels in Nigeria: an observational cohort study.

Chris Ka Pun Mok, Airu Zhu, Jingxian Zhao, Eric H Y Lau, Junxiang Wang, Zhao Chen, Zhen Zhuang, Yanqun Wang, Abeer N Alshukairi, Salim A Baharoon and 8 more

Open access · greenAbstract readObservational Study
In one paragraph

Observational study in The Lancet. Infectious diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
57citing papers in PubMed, 2 pooled it
1.3field-weighted citation impact, top 11% 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

57 citing papers in PubMed, 2 syntheses or guidelines pooled it, 89 citations in OpenAlex.

  1. Camel (International journal of molecular sciences · 2022
    Pooled it
  2. Recent Advances in Camel Immunology.Frontiers in immunology · 2020
    Pooled it
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

18 authors at 6 institutions in 4 countries.

Chris Ka Pun MokState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; HKU-Pasteur Research Pole, The University of Hong Kong, Hong Kong Special Administrative Region, China; School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China.
Airu ZhuState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; Nanshan Medicine Innovation Institute of Guangdong Province Guangzhou, Guangdong, China.
Jingxian ZhaoState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
Eric H Y LauSchool of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China.
Junxiang WangState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
Zhao ChenState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
Zhen ZhuangState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
Yanqun WangState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
Abeer N AlshukairiKing Faisal Specialist Hospital and Research Centre, Jeddah, Saudi Arabia.
Salim A BaharoonKing Saud bin Abdulaziz for Health Sciences University, Riyadh, Saudi Arabia.
Wenling WangNational Health Commission Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Centre for Disease Control and Prevention, Beijing, China.
Wenjie TanNational Health Commission Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Centre for Disease Control and Prevention, Beijing, China.
Weiwen LiangState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China.
Jamiu O OladipoSchool of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China.
Ranawaka A P M PereraSchool of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China.
Sulyman A KurangaDepartment of Surgery, Faculty of Clinical Sciences, University of Ilorin, Ilorin, Nigeria.
Malik PeirisState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; HKU-Pasteur Research Pole, The University of Hong Kong, Hong Kong Special Administrative Region, China; School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China. Electronic address: malik@hku.hk.
Jincun ZhaoState Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; Guangzhou Eighth People's Hospital of Guangzhou Medical University, Guangzhou, China. Electronic address: zhaojincun@gird.cn.
First Affiliated Hospital of Guangzhou Medical University · CNKing Saud bin Abdulaziz University for Health Sciences · SAUniversity of Ilorin · NGKing Faisal Specialist Hospital & Research Centre · SANational Institute for Viral Disease Control and Prevention · CNUniversity of Hong Kong · HK

Funding

NIAID NIH HHS HHSN272201400006C
6 · The paper itself

Abstract

backgroundMiddle East respiratory syndrome (MERS) remains of global public health concern. Dromedary camels are the source of zoonotic infection. Over 70% of MERS coronavirus (MERS-CoV)-infected dromedaries are found in Africa but no zoonotic disease has been reported in Africa. We aimed to understand whether individuals with exposure to dromedaries in Africa had been infected by MERS-CoV.

methodsWorkers slaughtering dromedaries in an abattoir in Kano, Nigeria, were compared with abattoir workers without direct dromedary contact, non-abattoir workers from Kano, and controls from Guangzhou, China. Exposure to dromedaries was ascertained using a questionnaire. Serum and peripheral blood mononuclear cells (PBMCs) were tested for MERS-CoV specific neutralising antibody and T-cell responses.

findingsNone of the participants from Nigeria or Guangdong were MERS-CoV seropositive. 18 (30%) of 61 abattoir workers with exposure to dromedaries, but none of 20 abattoir workers without exposure (p=0·0042), ten non-abattoir workers or 24 controls from Guangzhou (p=0·0002) had evidence of MERS-CoV-specific CD4

interpretationZoonotic infection of dromedary-exposed individuals is taking place in Nigeria and suggests that the extent of MERS-CoV infections in Africa is underestimated. MERS-CoV could therefore adapt to human transmission in Africa rather than the Arabian Peninsula, where attention is currently focused.

fundingThe National Science and Technology Major Project, National Institutes of Health.

Indexed as

AdolescentAdultAgedAnimalsAntibodies, NeutralizingCamelusCD4-Positive T-LymphocytesCD8-Positive T-LymphocytesCohort StudiesCoronavirus InfectionsFemaleHumansLeukocytes, MononuclearMaleMiddle AgedMiddle East Respiratory Syndrome CoronavirusAntibodies, Neutralizing

Identifiers

PMID33035474
PMCPMC7538089
OpenAlexW3090384486

What OpenQuestion holds

Textmetadata
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.