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.
Genetically Distinct African Swine Fever Virus Genotype II Variant in Wild Boar, Spain, 2025–2026
Carmina Gallardo
, Marina Marcet-Houben, Montserrat Agüero, Raquel Nieto, Nadia Casado, Alejandro Soler, María José Ruano, Rubén Villalba, Jovita Fernández-Pinero, Alicia Simón, Covadonga Pérez, Concepción Gómez, Cecilia García, Mireia Labrador, Jordi Argilaguet, Liani Coronado, Natàlia Majó, Pilar Aguilera-Sepulveda, Irene Aldea, Toni Gabaldón, María Belén Gómez, and Marisa Arias
Author affiliation: Centro de Investigación en Sanidad Animal, Valdeolmos, Spain (C. Gallardo, R. Nieto, N. Casado, A. Soler, J. Fernandez-Pinero, A. Simón, C. Pérez, C. Gómez, P. Aguilera-Sepulveda, I. Aldea, M. Arias); Barcelona Supercomputing Center, Barcelona, Spain (M. Marcet-Houben, C. García, M. Labrador, T. Gabaldón); Institute for Research in Biomedicine, Barcelona (M. Marcet-Houben, C. García, M. Labrador, T. Gabaldón); CIBER de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain (M. Marcet-Houben, T. Gabaldón); Laboratorio Central de Veterinaria, Algete, Spain (M. Agüero, M.J. Ruano, R. Villalba, M.B. Gómez); Unitat Mixta d’Investigació Institut de Recerca i Tecnologia Agroalimentàries–Universitat Autònoma de Barcelona en Sanitat Animal, Barcelona (J. Argilaguet, L. Coronado, N. Majó); Centre de Recerca en Sanitat Animal, Barcelona (J. Argilaguet, L. Coronado); World Organisation for Animal Health Collaborating Centre for the Research and Control of Emerging and Re-Emerging Swine Diseases in Europe, Barcelona (J. Argilaguet, L. Coronado, N. Majó); Universitat Autónoma de Barcelona, Barcelona (N. Majó); Catalan Institution for Research and Advanced Studies, Barcelona (T. Gabaldón)
Main Article
Figure 1
Figure 1. Spatial distribution of African swine fever virus (ASFV)–positive wild boar cases detected in northeastern Spain, 2025–2026. A) Geographic distribution of ASFV-positive wild boar cases detected during November 2025–May 2026 in the affected area in Barcelona. Red dots indicate cases selected for whole-genome sequencing. B) Enlarged view of the main affected area showing the spatial distribution of sequenced ASFV-positive wild boar cases. Numbers correspond to genome identifiers: 1, SP25WBCASE1 (index case); 2, SP25WBCASE2 (index case); 5, SP25WBCASE5 (case 0); 8, SP26WBCASE8; 11, SP26WBCASE11; 14, SP26WBCASE14; 23, SP26WBCASE23; 25, SP26WBCASE25.
Main Article
Page created: July 21, 2026
Page updated: August 19, 2026
Page reviewed: August 19, 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.