Evidence map›Paper›PMID 25323704›Full record

Observational studyClinical infectious diseases : an official publication of the Infectious Diseases Society of America2015

An observational, laboratory-based study of outbreaks of middle East respiratory syndrome coronavirus in Jeddah and Riyadh, kingdom of Saudi Arabia, 2014.

Christian Drosten, Doreen Muth, Victor M Corman, Raheela Hussain, Malaki Al Masri, Waleed HajOmar, Olfert Landt, Abdullah Assiri, Isabella Eckerle, Ali Al Shangiti and 5 more

Abstract readObservational Study
In one paragraph

Observational study in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 126 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
126citing papers in PubMed, 3 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

126 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
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  4. Article
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  6. Epidemiological Characteristics of MERS-CoV Human Cases, 2012- 2025.Journal of epidemiology and global health · 2025
    Article
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  13. Zoonotic diseases transmitted from the camels.Frontiers in veterinary science · 2023
    Review
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  18. Zoonotic coronavirus epidemics: Severe acute respiratory syndrome, Middle East respiratory syndrome, and coronavirus disease 2019.Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology · 2021
    Review
  19. Review
  20. Article

66 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors.

Christian DrostenInstitute of Virology, University of Bonn Medical Centre German Centre for Infection Research, Hannover, Germany.
Doreen MuthInstitute of Virology, University of Bonn Medical Centre.
Victor M CormanInstitute of Virology, University of Bonn Medical Centre German Centre for Infection Research, Hannover, Germany.
Raheela HussainJeddah Regional Laboratory.
Malaki Al MasriGlobal Centre for Mass Gatherings Medicine.
Waleed HajOmarRegional Laboratory, Ministry of Health, Riyadh, Kingdom of Saudi Arabia.
Olfert LandtTib-Molbiol, Berlin, Germany.
Abdullah AssiriGlobal Centre for Mass Gatherings Medicine.
Isabella EckerleInstitute of Virology, University of Bonn Medical Centre.
Ali Al ShangitiRegional Laboratory, Ministry of Health, Riyadh, Kingdom of Saudi Arabia.
Jaffar A Al-TawfiqJohns Hopkins Aramco Healthcare, Saudi Aramco, Dhahran, Kingdom of Saudi Arabia Indiana University School of Medicine, Indianapolis.
Ali AlbarrakPrince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia.
Alimuddin ZumlaGlobal Centre for Mass Gatherings Medicine Division of Infection and Immunity, University College London National Institute for Health Research Biomedical Research Centre, University College London Hospitals National Health Service Foundation Trust.
Andrew RambautInstitute of Evolutionary Biology, University of Edinburgh, Centre for Infection, Immunity and Evolution, University of Edinburgh, United Kingdom Fogarty International Center, National Institutes of Health, Bethesda, Maryland.
Ziad A MemishGlobal Centre for Mass Gatherings Medicine Alfaisal University, Riyadh, Kingdom of Saudi Arabia.

Funding

Wellcome Trust 095831
6 · The paper itself

Abstract

backgroundIn spring 2014, a sudden rise in the number of notified Middle East respiratory syndrome coronavirus (MERS-CoV) infections occurred across Saudi Arabia with a focus in Jeddah. Hypotheses to explain the outbreak pattern include increased surveillance, increased zoonotic transmission, nosocomial transmission, and changes in viral transmissibility, as well as diagnostic laboratory artifacts.

methodsDiagnostic results from Jeddah Regional Laboratory were analyzed. Viruses from the Jeddah outbreak and viruses occurring during the same time in Riyadh, Al-Kharj, and Madinah were fully or partially sequenced. A set of 4 single-nucleotide polymorphisms distinctive to the Jeddah outbreak were determined from additional viruses. Viruses from Riyadh and Jeddah were isolated and studied in cell culture.

resultsUp to 481 samples were received per day for reverse transcription polymerase chain reaction (RT-PCR) testing. A laboratory proficiency assessment suggested positive and negative results to be reliable. Forty-nine percent of 168 positive-testing samples during the Jeddah outbreak stemmed from King Fahd Hospital. All viruses from Jeddah were monophyletic and similar, whereas viruses from Riyadh were paraphyletic and diverse. A hospital-associated transmission cluster, to which cases in Indiana (United States) and the Netherlands belonged, was discovered in Riyadh. One Jeddah-type virus was found in Riyadh, with matching travel history to Jeddah. Virus isolates representing outbreaks in Jeddah and Riyadh were not different from MERS-CoV EMC/2012 in replication, escape of interferon response, or serum neutralization.

conclusionsVirus shedding and virus functions did not change significantly during the outbreak in Jeddah. These results suggest the outbreaks to have been caused by biologically unchanged viruses in connection with nosocomial transmission.

Indexed as

Disease OutbreaksMiddle East Respiratory Syndrome CoronavirusBase SequenceCoronavirus InfectionsCross InfectionHumansMolecular Sequence DataPolymorphism, Single NucleotideSaudi ArabiaMERS-coronavirusnosocomial transmissionoutbreaktransmission infection controlvirus isolation

Identifiers

PMID25323704
PMCPMC4303774

What OpenQuestion holds

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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.