Evidence map›Paper›PMID 42359066›Full record

ArticleFrontiers in medicine2026

Diagnostic challenges in COVID 19 and dengue co-infection: a case series report from tertiary care centers of Saudi Arabia.

Ashwaq M Al-Nazawi, Maseer Khan, Anjum Qadir, Rana Alghamdi, Alzahrani Ali Ahmed, Wafa Ali Hetany, Mohammad H Alharbi

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Article in Frontiers in medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

7 authors.

Ashwaq M Al-NazawiDepartment of Public Health, College of Nursing and Health Sciences, Jazan University, Jazan, Saudi Arabia.
Maseer KhanDepartment of Public Health, College of Nursing and Health Sciences, Jazan University, Jazan, Saudi Arabia.
Anjum QadirHealth Holding Company, Jeddah, Saudi Arabia.
Rana AlghamdiVector-Borne & Zoonotic Diseases Administration, Public Health, Second Health Cluster, Jeddah, Saudi Arabia.
Alzahrani Ali AhmedPreventive Medicine Department, Public Health Directorate, Ministry of Health, Jeddah, Saudi Arabia.
Wafa Ali HetanyDepartment of Public Health, College of Nursing and Health Sciences, Jazan University, Jazan, Saudi Arabia.
Mohammad H AlharbiDepartment of Public Health, College of Nursing and Health Sciences, Jazan University, Jazan, Saudi Arabia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: COVID-19 has changed the pattern of clinical diagnosis and laboratory confirmation for many communicable diseases making it essential for treatment procedures overburdening the health care system. Dengue and COVID-19, though caused by distinct viral pathogens, often present with overlapping clinical features, particularly in tropical and endemic regions. This overlap poses significant diagnostic challenges, especially during co-epidemics. Objective: To analyze the clinical presentation of patients suspected of dengue and/or COVID-19, and to highlight key similarities and differences that may assist in timely diagnosis and management. Methods: A retrospective case series of 50 patients admitted to multiple hospitals in a city in Saudi Arabia during a period of concurrent dengue and COVID-19 transmission was conducted. Patients were evaluated based on demographic characteristics, presenting symptoms, laboratory findings, and final diagnoses. Results: The mean age of patients was 39 ± 11.8 years, with 86% male and 14% female participants. Clinical overlap was considerable-fever, headache, myalgia, and rash were commonly reported in both infections. Notably, a cutaneous rash, classically associated with dengue, was observed in 36% of patients, including some confirmed COVID-19 cases. Misdiagnoses occurred due to atypical presentations, including a case initially diagnosed as dengue based on a petechial rash, later confirmed to be COVID-19. Co-infection cases exhibited more severe symptomatology and prolonged recovery. Most patients recovered after supportive management. However, co-infected patients demonstrated extended hospitalization and increased disease severity compared with mono-infected cases. Conclusion: This case series underscores the diagnostic complexity posed by the clinical similarity between dengue and COVID-19, particularly in endemic settings. Accurate and early differentiation through combined clinical and laboratory approaches is crucial to avoid misdiagnosis, ensure appropriate treatment, and reduce morbidity.

Indexed as

case seriesco-infectionCOVID-19dengueSaudi Arabia

Identifiers

PMID42359066
PMCPMC13292801

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