Evidence map›Paper›PMID 31022170›Full record

ArticlePLoS neglected tropical diseases2019

Clinical and molecular epidemiology of Crimean-Congo hemorrhagic fever in Oman.

Seif S Al-Abri, Roger Hewson, Hanan Al-Kindi, Idris Al-Abaidani, Amina Al-Jardani, Amal Al-Maani, Samira Almahrouqi, Barry Atkinson, Adil Al-Wahaibi, Bader Al-Rawahi and 2 more

Abstract read
In one paragraph

Article in PLoS neglected tropical diseases, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing 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

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

  1. Pooled it
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  3. TheSultan Qaboos University medical journal · 2026
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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

12 authors.

Seif S Al-AbriSeif Al-Abri, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.ORCID 0000-0002-2669-6814
Roger HewsonClinical Sciences, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.
Hanan Al-KindiCentral Public Health Laboratory, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.
Idris Al-AbaidaniDepartment of Communicable Diseases, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.
Amina Al-JardaniCentral Public Health Laboratory, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.
Amal Al-MaaniDepartment of Infection Prevention and Control, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.ORCID 0000-0001-8322-8331
Samira AlmahrouqiCentral Public Health Laboratory, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.
Barry AtkinsonWHO Collaborating Centre for Virus Reference and Research (Special Pathogens), Public Health England - National Infection Service, Porton Down, Salisbury, United Kingdom.ORCID 0000-0002-1348-7204
Adil Al-WahaibiDepartment of Surveillance, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.ORCID 0000-0002-5052-0800
Bader Al-RawahiDepartment of Communicable Diseases, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.
Shyam BawikarDepartment of Surveillance, Directorate General for Disease Surveillance and Control, MoH, Muscat, Oman.
Nicholas J BeechingClinical Sciences, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.ORCID 0000-0002-7019-8791

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCrimean-Congo hemorrhagic fever (CCHF) is a serious disease with a high fatality rate reported in many countries. The first case of CCHF in Oman was detected in 1995 and serosurveys have suggested widespread infection of humans and livestock throughout the country. METHODOLOGY: Cases of CCHF reported to the Ministry of Health (MoH) of Oman between 1995 and 2017 were retrospectively reviewed. Diagnosis was confirmed by serology and/or molecular tests in Oman. Stored RNA from recent cases was studied by sequencing the complete open reading frame (ORF) of the viral S segment at Public Health England, enabling phylogenetic comparisons to be made with other S segments of strains obtained from the region.

findingsOf 88 cases of CCHF, 4 were sporadic in 1995 and 1996, then none were detected until 2011. From 2011-2017, incidence has steadily increased and 19 (23.8%) of 80 cases clustered around Eid Al Adha. The median (range) age was 33 (15-68) years and 79 (90%) were male. The major risk for infection was contact with animals and/or butchering in 73/88 (83%) and only one case was related to tick bites alone. Severe cases were over-represented: 64 (72.7%) had a platelet count < 50 x 109/L and 32 (36.4%) died. There was no intrafamilial spread or healthcare-associated infection. The viral S segments from 11 patients presenting in 2013 and 2014 were all grouped in Asia 1 (IV) lineage.

conclusionsCCHF is well-established throughout Oman, with a single strain of virus present for at least 20 years. Most patients are men involved in animal husbandry and butchery. The high mortality suggests that there is substantial under-diagnosis of milder cases. Preventive measures have been introduced to reduce risks of transmission to animal handlers and butchers and to maintain safety in healthcare settings.

Indexed as

AdolescentAdultAgedAnimal HusbandryAnimalsFemaleHemorrhagic Fever, CrimeanHemorrhagic Fever Virus, Crimean-CongoHumansIncidenceMaleMiddle AgedMolecular EpidemiologyOmanRetrospective StudiesTicks

Identifiers

PMID31022170
PMCPMC6504112

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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.