Molecular Epidemiology of Western Equine Encephalitis Virus, South America, 2023-2024.
Animals
Encephalitis Virus, Western Equine
/ genetics
Humans
Disease Outbreaks
Horses
Phylogeny
Molecular Epidemiology
Uruguay
/ epidemiology
South America
/ epidemiology
Horse Diseases
/ epidemiology
Male
Encephalomyelitis, Western Equine
/ epidemiology
Female
Argentina
/ epidemiology
Encephalomyelitis, Equine
/ epidemiology
Adult
Argentina
Brazil
South America
Uruguay
Western equine encephalitis virus
alphavirus
arbovirus
central nervous system infection
meningitis/encephalitis
mosquito-borne alphavirus
vector-borne infections
viruses
zoonoses
Journal
Emerging infectious diseases
ISSN: 1080-6059
Titre abrégé: Emerg Infect Dis
Pays: United States
ID NLM: 9508155
Informations de publication
Date de publication:
Sep 2024
Sep 2024
Historique:
medline:
23
8
2024
pubmed:
23
8
2024
entrez:
22
8
2024
Statut:
ppublish
Résumé
Western equine encephalitis virus (WEEV) is a mosquitoborne virus that reemerged in December 2023 in Argentina and Uruguay, causing a major outbreak. We investigated the outbreak using epidemiologic, entomological, and genomic analyses, focusing on WEEV circulation near the Argentina‒Uruguay border in Rio Grande do Sul state, Brazil. During November 2023‒April 2024, the outbreak in Argentina and Uruguay resulted in 217 human cases, 12 of which were fatal, and 2,548 equine cases. We determined cases on the basis of laboratory and clinical epidemiologic criteria. We characterized 3 fatal equine cases caused by a novel WEEV lineage identified through a nearly complete coding sequence analysis, which we propose as lineage C. Our findings highlight the importance of continued surveillance and equine vaccination to control future WEEV outbreaks in South America.
Identifiants
pubmed: 39173662
doi: 10.3201/eid3009.240530
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM