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Dengue Virus Serotype 1 Exported to Japan from Côte d'Ivoire, 2019
Tetsuya Suzuki1, Satoshi Kutsuna1, Takato Nakamoto1
1Department of Infectious Diseases, Disease Control and Prevention Center, National Center for Global Health and Medicine, Japan.
Insights
Dengue virus type 1 (DENV-1) predominated in Côte d'Ivoire's 2019 outbreak, with genetic analysis showing it originated from Southeast Asia. Imported dengue cases can signal potential outbreaks in their country of origin.
Area of Science:
- Medical Entomology
- Virology
- Epidemiology
Background:
- Dengue fever outbreaks are recurrent in Côte d'Ivoire.
- Dengue virus type 1 (DENV-1) was the primary serotype identified during the 2019 outbreak.
Abstract:
Dengue fever outbreaks have been repeatedly reported in Côte d'Ivoire. During the 2019 outbreak, DENV-1 was the predominant strain and phylogenetic analysis of the DENV-1 genome obtained from the present patient who returned to Japan in January 2019 revealed a high homology with the 2013-2014 Southeast Asian strains. In a previous outbreak in 2017, DENV-1 accounted for 5% of the DENV serotypes. The endemic DENV-1 strain in Abidjan in 2019 could be a strain that was imported from Southeast Asia. Dengue virus can spread globally, and imported dengue fever cases could serve as an alert for outbreaks in the exporting country.
