West Nile fever outbreak in horses and humans, Spain, 2010.
Abstract: TO THE EDITOR: West Nile virus (WNV) is a member of the genus Flavivirus within the Japanese encephalitis antigenic complex. The enzootic virus cycle involves transmission between avian hosts and ornithophilic mosquitoes, whereas humans and horses are considered dead-end hosts. Given the recent increase of WNV infection in humans and horses in Europe, concern has been raised regarding public and animal health.
Publication Date: 2011-12-17 PubMed ID: 22172565PubMed Central: PMC3311180DOI: 10.3201/eid1712.110651Google Scholar: Lookup
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Summary
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This research article discusses an outbreak of West Nile fever in horses and humans in Spain in 2010, investigating the role of the West Nile Virus (WNV) in this occurrence and the concern it raises about public and animal health.
Explanation of the Research Paper
- The paper begins by identifying the West Nile Virus (WNV) as a member of the Flavivirus genus, within the realm of the Japanese encephalitis antigenic complex. This points to the relation of WNV to other similar viruses and their potential effects on health.
- It moves on to describe the enzootic virus cycle, which involves transmission between avian hosts and ornithophilic mosquitoes. In this context, ‘avian hosts’ refers to bird species that carry the virus and ‘ornithophilic mosquitoes’ are mosquitoes that predominantly feed on birds. The detailing of this cycle helps us understand how the virus spreads in nature.
- Next, it mentions that humans and horses are considered dead-end hosts. This signifies that while humans and horses can get infected by WNV, they are not the primary hosts or carriers of the virus, i.e., they do not contribute significantly to the further spread of the virus once infected.
- This explanation explores the recent rise in WNV infection in humans and horses across Europe. It indirectly indicates a growing public health concern due to the increase in cases.
- Lastly, the abstract emphasises on underlying concern for both public and animal health. Here, the ‘concern’ refers to the potential risks and impacts posed by the spread of the WNV on the general public’s health and the health of animals, particularly horses.
Overall, the abstract is setting the stage for a larger discussion on the challenges and implications of WNV spread in the European context, with a particular focus on the specific outbreak in Spain during 2010. It highlights its impacts on both human and animal health and marks the importance of vigilance against such diseases.
Cite This Article
APA
García-Bocanegra I, Jaén-Téllez JA, Napp S, Arenas-Montes A, Fernández-Morente M, Fernández-Molera V, Arenas A.
(2011).
West Nile fever outbreak in horses and humans, Spain, 2010.
Emerg Infect Dis, 17(12), 2397-2399.
https://doi.org/10.3201/eid1712.110651 Publication
Researcher Affiliations
MeSH Terms
- Aged
- Animals
- Communicable Diseases, Emerging / epidemiology
- Communicable Diseases, Emerging / veterinary
- Communicable Diseases, Emerging / virology
- Disease Outbreaks / veterinary
- Horse Diseases / epidemiology
- Horse Diseases / virology
- Horses
- Humans
- Male
- Middle Aged
- Spain / epidemiology
- West Nile Fever / epidemiology
- West Nile Fever / veterinary
- West Nile Fever / virology
- West Nile virus / classification
- West Nile virus / genetics
- West Nile virus / isolation & purification
- Zoonoses / epidemiology
- Zoonoses / virology
References
This article includes 10 references
- Bofill D, Domingo C, Cardeñosa N, Zaragoza J, de Ory F, Minguell S, Sánchez-Seco MP, Domínguez A, Tenorio A. Human West Nile virus infection, Catalonia, Spain.. Emerg Infect Dis 2006 Jul;12(7):1163-4.
- Jiménez-Clavero MA, Llorente F, Sotelo E, Soriguer R, Gómez-Tejedor C, Figuerola J. West Nile virus serosurveillance in horses in Donana, Spain, 2005 to 2008.. Vet Rec 2010 Sep 4;167(10):379-80.
- García-Bocanegra I, Busquets N, Napp S, Alba A, Zorrilla I, Villalba R, Arenas A. Serosurvey of West Nile virus and other flaviviruses of the Japanese encephalitis antigenic complex in birds from Andalusia, southern Spain.. Vector Borne Zoonotic Dis 2011 Aug;11(8):1107-13.
- Kaptoul D, Viladrich PF, Domingo C, Niubó J, Martínez-Yélamos S, De Ory F, Tenorio A. West Nile virus in Spain: report of the first diagnosed case (in Spain) in a human with aseptic meningitis.. Scand J Infect Dis 2007;39(1):70-1.
- Höfle U, Blanco JM, Crespo E, Naranjo V, Jiménez-Clavero MA, Sanchez A, de la Fuente J, Gortazar C. West Nile virus in the endangered Spanish imperial eagle.. Vet Microbiol 2008 May 25;129(1-2):171-8.
- Jiménez-Clavero MA, Agüero M, Rojo G, Gómez-Tejedor C. A new fluorogenic real-time RT-PCR assay for detection of lineage 1 and lineage 2 West Nile viruses.. J Vet Diagn Invest 2006 Sep;18(5):459-62.
- Sotelo E, Fernández-Pinero J, Llorente F, Vázquez A, Moreno A, Agüero M, Cordioli P, Tenorio A, Jiménez-Clavero MÁ. Phylogenetic relationships of Western Mediterranean West Nile virus strains (1996-2010) using full-length genome sequences: single or multiple introductions?. J Gen Virol 2011 Nov;92(Pt 11):2512-2522.
- Agüero M, Fernández-Pinero J, Buitrago D, Sánchez A, Elizalde M, San Miguel E, Villalba R, Llorente F, Jiménez-Clavero MA. Bagaza virus in partridges and pheasants, Spain, 2010.. Emerg Infect Dis 2011 Aug;17(8):1498-501.
- Agencia Estatal de Meteorología (AEMET). Series climatológicas 2011. [cited 2011 Feb 22]. http://www.aemet.es/es/sevidor-datos/acceso--datos/listado-contenidos/detalles/series_climatologicas
- Ministerio de Medio Ambiente y Rural y Marino Medio. National Surveillance Program of WNV in Spain, 2011. [cited 2011 Jul 12]. http://rasve.mapa.es/publica/programas/normativa%20y%20programas/programas/2011/fiebre%20del%20nilo%20occidental/plan%20de%20vigilancia%20de%20la%20encefalitis%20del%20oeste%20del%20nilo%202011.pdf
Citations
This article has been cited 42 times.- Ruiz-López MJ, Muñoz-Chimeno M, Figuerola J, Gavilán AM, Varona S, Cuesta I, Martínez-de la Puente J, Zaballos Á, Molero F, Soriguer RC, Sánchez-Seco MP, Ruiz S, Vázquez A. Genomic Analysis of West Nile Virus Lineage 1 Detected in Mosquitoes during the 2020-2021 Outbreaks in Andalusia, Spain. Viruses 2023 Jan 17;15(2).
- Cavalleri JV, Korbacska-Kutasi O, Leblond A, Paillot R, Pusterla N, Steinmann E, Tomlinson J. European College of Equine Internal Medicine consensus statement on equine flaviviridae infections in Europe. J Vet Intern Med 2022 Nov;36(6):1858-1871.
- García-Bocanegra I, Franco JJ, León CI, Barbero-Moyano J, García-Miña MV, Fernández-Molera V, Gómez MB, Cano-Terriza D, Gonzálvez M. High exposure of West Nile virus in equid and wild bird populations in Spain following the epidemic outbreak in 2020. Transbound Emerg Dis 2022 Nov;69(6):3624-3636.
- Figuerola J, Jiménez-Clavero MÁ, Ruíz-López MJ, Llorente F, Ruiz S, Hoefer A, Aguilera-Sepúlveda P, Jiménez-Peñuela J, García-Ruiz O, Herrero L, Soriguer RC, Fernández Delgado R, Sánchez-Seco MP, Martínez-de la Puente J, Vázquez A. A One Health view of the West Nile virus outbreak in Andalusia (Spain) in 2020. Emerg Microbes Infect 2022 Dec;11(1):2570-2578.
- Bergmann F, Trachsel DS, Stoeckle SD, Bernis Sierra J, Lübke S, Groschup MH, Gehlen H, Ziegler U. Seroepidemiological Survey of West Nile Virus Infections in Horses from Berlin/Brandenburg and North Rhine-Westphalia, Germany. Viruses 2022 Jan 25;14(2).
- Napp S, Llorente F, Beck C, Jose-Cunilleras E, Soler M, Pailler-García L, Amaral R, Aguilera-Sepúlveda P, Pifarré M, Molina-López R, Obón E, Nicolás O, Lecollinet S, Jiménez-Clavero MÁ, Busquets N. Widespread Circulation of Flaviviruses in Horses and Birds in Northeastern Spain (Catalonia) between 2010 and 2019. Viruses 2021 Nov 30;13(12).
- Atadiose EO, Kabir J, Adamu SG, Umoh JU. Serosurvey of West Nile virus in horses and detection of West Nile virus antigen in mosquitoes in Kaduna State, Nigeria. J Equine Sci 2020 Oct;31(3):61-66.
- Portillo A, Ruiz-Arrondo I, Oteo JA. Arthropods as vectors of transmissible diseases in Spain. Med Clin (Engl Ed) 2018 Dec 14;151(11):450-459.
- Velasco M, Sánchez-Seco MP, Campelo C, de Ory F, Martin O, Herrero L, Salmerón Béliz OJ, Minguito T, Campos MC, Molero F, Algora A, Vázquez A. Imported Human West Nile Virus Lineage 2 Infection in Spain: Neurological and Gastrointestinal Complications. Viruses 2020 Jan 29;12(2).
- Napp S, Montalvo T, Piñol-Baena C, Gómez-Martín MB, Nicolás-Francisco O, Soler M, Busquets N. Usefulness of Eurasian Magpies (Pica pica) for West Nile virus Surveillance in Non-Endemic and Endemic Situations. Viruses 2019 Aug 5;11(8).
- Paaijmans K, Brustollin M, Aranda C, Eritja R, Talavera S, Pagès N, Huijben S. Phenotypic insecticide resistance in arbovirus mosquito vectors in Catalonia and its capital Barcelona (Spain). PLoS One 2019;14(7):e0217860.
- Busquets N, Laranjo-González M, Soler M, Nicolás O, Rivas R, Talavera S, Villalba R, San Miguel E, Torner N, Aranda C, Napp S. Detection of West Nile virus lineage 2 in North-Eastern Spain (Catalonia). Transbound Emerg Dis 2019 Mar;66(2):617-621.
- Lustig Y, Sofer D, Bucris ED, Mendelson E. Surveillance and Diagnosis of West Nile Virus in the Face of Flavivirus Cross-Reactivity. Front Microbiol 2018;9:2421.
- Portillo A, Ruiz-Arrondo I, Oteo JA. Arthropods as vectors of transmisible diseases in Spain. Med Clin (Barc) 2018 Dec 14;151(11):450-459.
- Kosch R, Delarocque J, Claus P, Becker SC, Jung K. Gene expression profiles in neurological tissues during West Nile virus infection: a critical meta-analysis. BMC Genomics 2018 Jul 13;19(1):530.
- Martínez-de la Puente J, Ferraguti M, Ruiz S, Roiz D, Llorente F, Pérez-Ramírez E, Jiménez-Clavero MÁ, Soriguer R, Figuerola J. Mosquito community influences West Nile virus seroprevalence in wild birds: implications for the risk of spillover into human populations. Sci Rep 2018 Feb 8;8(1):2599.
- Leggewie M, Badusche M, Rudolf M, Jansen S, Börstler J, Krumkamp R, Huber K, Krüger A, Schmidt-Chanasit J, Tannich E, Becker SC. Culex pipiens and Culex torrentium populations from Central Europe are susceptible to West Nile virus infection. One Health 2016 Dec;2:88-94.
- García-Bocanegra I, Paniagua J, Gutiérrez-Guzmán AV, Lecollinet S, Boadella M, Arenas-Montes A, Cano-Terriza D, Lowenski S, Gortázar C, Höfle U. Spatio-temporal trends and risk factors affecting West Nile virus and related flavivirus exposure in Spanish wild ruminants. BMC Vet Res 2016 Nov 9;12(1):249.
- Conte A, Candeloro L, Ippoliti C, Monaco F, De Massis F, Bruno R, Di Sabatino D, Danzetta ML, Benjelloun A, Belkadi B, El Harrak M, Declich S, Rizzo C, Hammami S, Ben Hassine T, Calistri P, Savini G. Spatio-Temporal Identification of Areas Suitable for West Nile Disease in the Mediterranean Basin and Central Europe. PLoS One 2015;10(12):e0146024.
- Fortuna C, Remoli ME, Di Luca M, Severini F, Toma L, Benedetti E, Bucci P, Montarsi F, Minelli G, Boccolini D, Romi R, Ciufolini MG. Experimental studies on comparison of the vector competence of four Italian Culex pipiens populations for West Nile virus. Parasit Vectors 2015 Sep 17;8:463.
- Roiz D, Ruiz S, Soriguer R, Figuerola J. Landscape Effects on the Presence, Abundance and Diversity of Mosquitoes in Mediterranean Wetlands. PLoS One 2015;10(6):e0128112.
- Di Sabatino D, Bruno R, Sauro F, Danzetta ML, Cito F, Iannetti S, Narcisi V, De Massis F, Calistri P. Epidemiology of West Nile disease in Europe and in the Mediterranean Basin from 2009 to 2013. Biomed Res Int 2014;2014:907852.
- Ergunay K, Gunay F, Erisoz Kasap O, Oter K, Gargari S, Karaoglu T, Tezcan S, Cabalar M, Yildirim Y, Emekdas G, Alten B, Ozkul A. Serological, molecular and entomological surveillance demonstrates widespread circulation of West Nile virus in Turkey. PLoS Negl Trop Dis 2014 Jul;8(7):e3028.
- Roiz D, Ruiz S, Soriguer R, Figuerola J. Climatic effects on mosquito abundance in Mediterranean wetlands. Parasit Vectors 2014 Jul 16;7:333.
- Prow NA, Setoh YX, Biron RM, Sester DP, Kim KS, Hobson-Peters J, Hall RA, Bielefeldt-Ohmann H. The West Nile virus-like flavivirus Koutango is highly virulent in mice due to delayed viral clearance and the induction of a poor neutralizing antibody response. J Virol 2014 Sep 1;88(17):9947-62.
- Prow NA. The changing epidemiology of Kunjin virus in Australia. Int J Environ Res Public Health 2013 Nov 25;10(12):6255-72.
- Pem-Novosel I, Vilibic-Cavlek T, Gjenero-Margan I, Pandak N, Peric L, Barbic L, Listes E, Cvitkovic A, Stevanovic V, Savini G. First outbreak of West Nile virus neuroinvasive disease in humans, Croatia, 2012. Vector Borne Zoonotic Dis 2014 Jan;14(1):82-4.
- Pupella S, Pisani G, Cristiano K, Catalano L, Grazzini G. West Nile virus in the transfusion setting with a special focus on Italian preventive measures adopted in 2008-2012 and their impact on blood safety. Blood Transfus 2013 Oct;11(4):563-74.
- Ziegler U, Skrypnyk A, Keller M, Staubach C, Bezymennyi M, Damiani AM, Osterrieder N, Groschup MH. West nile virus antibody prevalence in horses of Ukraine. Viruses 2013 Oct 4;5(10):2469-82.
- Angenvoort J, Brault AC, Bowen RA, Groschup MH. West Nile viral infection of equids. Vet Microbiol 2013 Nov 29;167(1-2):168-80.
- Ziegler U, Angenvoort J, Klaus C, Nagel-Kohl U, Sauerwald C, Thalheim S, Horner S, Braun B, Kenklies S, Tyczka J, Keller M, Groschup MH. Use of competition ELISA for monitoring of West Nile virus infections in horses in Germany. Int J Environ Res Public Health 2013 Jul 24;10(8):3112-20.
- Añez G, Grinev A, Chancey C, Ball C, Akolkar N, Land KJ, Winkelman V, Stramer SL, Kramer LD, Rios M. Evolutionary dynamics of West Nile virus in the United States, 1999-2011: phylogeny, selection pressure and evolutionary time-scale analysis. PLoS Negl Trop Dis 2013;7(5):e2245.
- Paz S, Malkinson D, Green MS, Tsioni G, Papa A, Danis K, Sirbu A, Ceianu C, Katalin K, Ferenczi E, Zeller H, Semenza JC. Permissive summer temperatures of the 2010 European West Nile fever upsurge. PLoS One 2013;8(2):e56398.
- Chuang TW, Wimberly MC. Remote sensing of climatic anomalies and West Nile virus incidence in the northern Great Plains of the United States. PLoS One 2012;7(10):e46882.
- Gamino V, Gutiérrez-Guzmán AV, Fernández-de-Mera IG, Ortíz JA, Durán-Martín M, de la Fuente J, Gortázar C, Höfle U. Natural Bagaza virus infection in game birds in southern Spain. Vet Res 2012 Sep 11;43(1):65.
- Gutiérrez-López R, Fernández-Delgado R, Aguilera-Sepúlveda P, Dafouz-Bustos D, Jiménez-Clavero MÁ, Llorente F. Spanish West Nile virus isolates of lineages 1 and 2 elicit different patterns of infection in red-legged partridges. J Gen Virol 2025 Dec;106(12).
- González MA, Barceló C, Muriel R, Rodríguez JJ, Rodríguez E, Figuerola J, Bravo-Barriga D. Rapid-Response Vector Surveillance and Emergency Control During the Largest West Nile Virus Outbreak in Southern Spain. Insects 2025 Oct 29;16(11).
- Busquets N, Gardela J, José-Cunilleras E, Solé A, Salvador MJ, Obón E, Molina-López R, Aranda C, Montalvo T, Corbella I, Bou-Monclús MA, Martínez MJ, Vázquez A, Piron M, Sauleda S, Pailler-García L, Napp S. West Nile virus transmission in the Metropolitan Area of Barcelona (Spain): A One-Health surveillance approach. One Health 2025 Dec;21:101150.
- Burgas-Pau A, Gardela J, Aranda C, Verdún M, Rivas R, Pujol N, Figuerola J, Busquets N. Laboratory evidence on the vector competence of European field-captured Culex theileri for circulating West Nile virus lineages 1 and 2. Parasit Vectors 2025 Apr 5;18(1):132.
- Naveed A, Eertink LG, Wang D, Li F. Lessons Learned from West Nile Virus Infection:Vaccinations in Equines and Their Implications for One Health Approaches. Viruses 2024 May 14;16(5).
- García-Carrasco JM, Muñoz AR, Olivero J, Segura M, García-Bocanegra I, Real R. West Nile virus in the Iberian Peninsula: using equine cases to identify high-risk areas for humans. Euro Surveill 2023 Oct;28(40).
- Macias A, Martín P, Pérez-Olmeda M, Fernández-Martínez B, Gómez-Barroso D, Fernández E, Ramos JM, Herrero L, Rodríguez S, Delgado E, Sánchez-Seco MP, Galán M, Corbacho AJ, Jimenez M, Montero-Peña C, Valle A, Vázquez A. West Nile virus emergence in humans in Extremadura, Spain 2020. Front Cell Infect Microbiol 2023;13:1155867.
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