Disclaimer: Early release articles are not considered as final versions. Any changes will be reflected in the online version in the month the article is officially released.
Volume 32, Number 8—August 2026
CME ACTIVITY - Synopsis
Western Equine Encephalitis Virus in Blood Donors during Outbreak, Argentina, 2023–2024
Sebastián Blanco
, María C. Frutos, Kevin Brenot, Alejandra González Bustamante, Luis H. Carrizo, and Sandra V. Gallego
, María C. Frutos, Kevin Brenot, Alejandra González Bustamante, Luis H. Carrizo, and Sandra V. Gallego
Table
Genome sequences used for phylogenetic analysis in study of western equine encephalitis virus in blood donors during outbreak, Argentina, 2023–2024*
| Accession no. | Isolate | Location | Host | Year | Lineage |
|---|---|---|---|---|---|
| GQ287640 | McMillan | Canada | Homo sapiens | 1941 | A |
| KJ554965 | California | United States | Equus caballus | 1930 | A |
| KT844544 | Y62–33 | Russia | Aedes cinereus | 1962 | A |
| KT844545 | CU71-CPA | Cuba | NA | 1971 | A |
| MN477208 | Fleming | United States | Homo sapiens | 1938 | A |
| GQ287644 | BFS-2005 | United States | Culex tarsalis | 1974 | B1 |
| KJ554966 | BFS932 | United States | Culex tarsalis | 1946 | B1 |
| KJ554968 | BFS1703 | United States | Culex tarsalis | 1953 | B1 |
| KJ554969 | E1416 | United States | Zonotrichia leucophrys | 1961 | B1 |
| KJ554973 | 75V9291 | United States | Culex tarsalis | 1975 | B2 |
| KJ554977 | PV02808A | United States | Culicidae | 1990 | B2 |
| KJ554980 | 93A38 | United States | Culicidae | 1992 | B2 |
| KJ554984 | CNTR34 | United States | Culex tarsalis | 1993 | B2 |
| KJ554985 | Lake43 | United States | Culex tarsalis | 1994 | B2 |
| KT844548 | SUYA140 | United States | Culex tarsalis | 1993 | B2 |
| KT844550 | Kern87 | United States | Culex tarsalis | 1996 | B2 |
| KU978771 | 97–5067 | United States | Meleagris gallopavo | 1996 | B2 |
| KU978772 | 98–2435 | United States | Dromaius novaehollandiae | 1997 | B2 |
| NC_003908 | 71V1658 | United States | NA | 1971 | B2 |
| GQ287641 | Imperial | United States | Culex tarsalis | 2005 | B3 |
| GQ287643 | Montana-64 | United States | Equus caballus | 1967 | B3 |
| GQ287647 | 85–452NM | United States | Culex tarsalis | 1985 | B3 |
| KJ554970 | S8–122 | United States | Hesperosciurus griseus | 1968 | B3 |
| KJ554971 | BT-235 | United States | Gopherus berlandieri | 1971 | B3 |
| KJ554972 | BFS3060 | United States | Culex tarsalis | 1971 | B3 |
| KJ554978 | IMPR441 | United States | Culex tarsalis | 1992 | B3 |
| KJ554983 | 93A79 | United States | Culicidae | 1993 | B3 |
| KJ554986 | PV72102 | United States | Culicidae | 1997 | B3 |
| KJ554987 | PV012357A | United States | Culicidae | 2001 | B3 |
| KJ554988 | R02PV002957B | United States | Culicidae | 2002 | B3 |
| KJ554991 | R0PV00384A | United States | Culicidae | 2005 | B3 |
| KT844547 | CHLV31 | United States | Culex tarsalis | 1985 | B3 |
| KT844543 | CBA87 | Argentina: Cordoba province | Equus ferus | 1958 | C |
| PP544260 | EQ1090 | Brazil | Equus caballus | 2023 | C |
| PP669618 | EQ1122 | Brazil | Equus caballus | 2023 | C |
| PP669617 | EQ237 | Brazil | Equus caballus | 2024 | C |
| PP620641 | DILAVE070 | Uruguay | Equus caballus | 2023 | C |
| PP620642 | DILAVE236 | Uruguay | Equus caballus | 2023 | C |
| PP620643 | DILAVE218 | Uruguay | Equus caballus | 2023 | C |
| PP620644 | DILAVE158 | Uruguay | Equus caballus | 2023 | C |
| PP620645 | DILAVE198 | Uruguay | Equus caballus | 2024 | C |
| PP620646 | DILAVE255 | Uruguay | Equus caballus | 2024 | C |
| KT844541 | TR25717 | Guyana | Equus ferus | 1959 | None |
| KT844542 | Ar_Enc_MV | Argentina: Buenos Aires province | Equus ferus | 1993 | None |
| NC_075015 | AG80–646 | Argentina: Chaco province | Culex | 1980 | None |
| PP669617 | EQ237–2024 | Brazil | Equus ferus | 2023 | C |
| PP544260 | EQ1090–2023 | Brazil | Equus ferus | 2023 | C |
| PV641588 | ARG_CBA_354546–1 | Argentina: Cordoba province | Homo sapiens | 2024 | C |
*All sequences obtained from GenBank. NA, not available.
Page created: June 07, 2026
Page updated: July 22, 2026
Page reviewed: July 22, 2026
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.