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Pertenecemos al Centro de Investigación VISAVET de la Universidad Complutense de Madrid (UCM). Trabajamos en investigación y en docencia de enfermedades infecciosas animales.

  • Vigiasan: Proyecto de Innovación Empleo de Tecnologías para evaluar el estado de salud, bienestar y productividad en ganado

  • VACDIVA quiere resolver el problema de la Peste Porcina Africana (PPA) en Europa y en los países afectados, desarrollando vacunas seguras y efectivas para cerdos domésticos y jabalíes, tests de diagnóstico y herramientas para estrategias de control y erradicación en Europa
  • Proyecto de Innovación "Empleo de Tecnologías para evaluar el estado de salud, bienestar y productividad en ganado"
  • Somos Laboratorio de Referencia de la Organización Mundial de la Sanidad Animal (OIE) en Peste Porcina Africana (PPA) y Peste Equina Africana PEA.
  • Realizamos el diagnóstico de los principales virus que afectan a las abejas, siendo pioneros en el desarrollo y puesta a punto de nuevas técnicas para su estudio.
  • La investigación epidemiologica de la Peste Porcina Clásica y Africana (PPC y PPA) son dos de nuestras prioridades.


Peste Porcina Africana Vídeos PPA Mapa Peste Porcina Africana

¿Qué podemos aprender de la epidemia de Peste porcina africana tras cinco años en Asia?

Publicamos un nuevo artículo en la revista Frontiers In Veterinary Science.

Resumen: Today’s global swine industry is exposed to the unprecedented threat of African swine fever (ASF). Asia, the site of the most recent epidemics, could serve as a huge viral reservoir for the rest of the world given the severity of the damage, the huge swine industry, and the high volume of trade with other countries around the world. As the majority of ASF notifications in Asia today originate from pig farms, the movement of live pigs and associated pork products are considered critical control points for disease management. Particularly, small-scale or backyard farms with low biosecurity levels are considered major risk factors. Meanwhile, wild boars account for most notified cases in some countries and regions, which makes the epidemiological scenario different from that in other Asian countries. As such, the current epidemic situation and higher risk factors differ widely between these countries. A variety of studies on ASF control have been conducted and many valuable insights have been obtained in Asia; nevertheless, the overall picture of the epidemic is still unclear. The purpose of this review is to provide an accurate picture of the epidemic situation across Asia, focusing on each subregion to comprehensively explain the disease outbreak. The knowledge gained from the ASF epidemics experienced in Asia over the past 5 years would be useful for disease control in areas that are already infected, such as Europe, as well as for non-affected areas to address preventive measures. To this end, the review includes two aspects: a descriptive analytical review based on publicly available databases showing overall epidemic trends, and an individualized review at the subregional level based on the available literature.

Ito S, Kawaguchi N, Bosch J, Aguilar Vega C y Sánchez-Vizcaíno JM

 Acceso abierto al artículo

Accelerometer-based detection of African swine fever infection in wild boar

Último artículo científico publicado en la revista Proceedings. Biological sciences.

Resumen: Infectious wildlife diseases that circulate at the interface with domestic animals pose significant threats worldwide and require early detection and warning. Although animal tracking technologies are used to discern behavioural changes, they are rarely used to monitor wildlife diseases. Common disease-induced behavioural changes include reduced activity and lethargy ('sickness behaviour'). Here, we investigated whether accelerometer sensors could detect the onset of African swine fever (ASF), a viral infection that induces high mortality in suids for which no vaccine is currently available. Taking advantage of an experiment designed to test an oral ASF vaccine, we equipped 12 wild boars with an accelerometer tag and quantified how ASF affects their activity pattern and behavioural fingerprint, using overall dynamic body acceleration. Wild boars showed a daily reduction in activity of 10-20% from the healthy to the viremia phase. Using change point statistics and comparing healthy individuals living in semi-free and free-ranging conditions, we show how the onset of disease-induced sickness can be detected and how such early detection could work in natural settings. Timely detection of infection in animals is crucial for disease surveillance and control, and accelerometer technology on sentinel animals provides a viable complementary tool to existing disease management approaches.

 Acceso abierto al artículo

Morelle K, Barasona JA, Bosch J, Heine G, Daim A, Arnold J, Bauch T, Kosowska A, Cadenas-Fernández E, Aviles MM, Zuñiga D, Wikelski M, Vizcaino-Sanchez JM, Safi K.

Quantitative risk assessment of African swine fever introduction into Spain by legal import of swine products

Nuevo artículo de investigación en la revista Research in Veterinary Science.

Resumen: African swine fever (ASF) is currently threatening the global swine industry. Its unstoppable global spread poses a serious risk to Spain, one of the world's leading producers. Over the past years, there has been an increased global burden of ASF not only in swine but also swine products. Unfortunately, many pigs are not diagnosed before slaughter and their products are used for human consumption. These ASF-contaminated products are only a source for new ASF outbreaks when they are consumed by domestic pigs or wild boar, which may happen either by swill feeding or landfill access. This study presents a quantitative stochastic risk assessment model for the introduction of ASF into Spain via the legal import of swine products, specifically pork and pork products. Entry assessment, exposure assessment, consequence assessment and risk estimation were carried out. The results suggest an annual probability of ASF introduction into Spain of 1.74 × 10-4, the highest risk being represented by Hungary, Portugal, and Poland. Monthly risk distribution is homogeneously distributed throughout the year. Illegal trade and pork product movement for own consumption (e.g., air and ship passenger luggage) have not been taken into account due to the lack of available, accredited data sources. This limitation may have influenced the model's outcomes and, the risk of introduction might be higher than that estimated. Nevertheless, the results presented herein would contribute to allocating resources to areas at higher risk, improving prevention and control strategies and, ultimately, would help reduce the risk of ASF introduction into Spain.

 Acceso abierto al artículo

Muñoz-Pérez C, Martínez-López B, Gómez-Vázquez JP, Aguilar-Vega C, Bosch J, Ito S, Martínez-Avilés M, Sánchez-Vizcaíno JM.

Low transmission risk of African swine fever virus between wild boar infected by an attenuated isolate and susceptible domestic pigs

Nuestro último artículo en la revista Frontiers in Veterinary Science.

Resumen: African swine fever (ASF) is a lethal infectious disease that affects domestic and wild pigs. This complex virus has already affected five continents and more than 70 countries and is considered to be the main threat to the global swine industry. The disease can potentially be transmitted directly through contact with infectious animals, or indirectly by means of contaminated feed or environments. Nevertheless, the knowledge regarding the transmission patterns of different ASF virus isolates at the wildlife-livestock interface is still limited. We have, therefore, assessed the potential transmission of an attenuated ASF virus isolate between infectious wild boar and directly exposed domestic pig. We registered 3,369 interspecific interactions between animals, which were brief and mostly initiated by wild boar. The major patterns observed during the study were head-to-head contact owing to sniffing, thus suggesting a high probability of pathogen transmission. However, only one of the five domestic pigs had a short period of viremia and became serologically positive for ASF virus antibodies. It was additionally discovered that the wild boar did not transmit the virulent virus isolate to the domestic pigs, which suggests that the presence of attenuated ASF virus isolates in affected areas may control the spreading of other more virulent isolates. These outcomes may help make decisions related to large-scale targeted management actions against ASF in field conditions.

 Acceso abierto al artículo

Kosowska A, Barasona JA, Barroso-Arévalo S, Blondeau Leon L, Cadenas-Fernández E, Sánchez-Vizcaíno JM.

Epidemiological and genetic analysis of Cetacean Morbillivirus circulating on the Italian coast between 2018 and 2021

Último artículo científico publicado en la revista Frontiers in Veterinary Science.

Resumen: Cetacean morbillivirus (CeMV) has caused several outbreaks, unusual mortality events, and interepidemic single-lethal disease episodes in the Mediterranean Sea. Since 2012, a new strain with a northeast (NE) Atlantic origin has been circulating among Mediterranean cetaceans, causing numerous deaths. The objective of this study was to determine the prevalence of CeMV in cetaceans stranded in Italy between 2018 and 2021 and characterize the strain of CeMV circulating. Out of the 354 stranded cetaceans along the Italian coastlines, 113 were CeMV-positive. This prevalence (31.9%) is one of the highest reported without an associated outbreak. All marine sectors along the Italian coastlines, except for the northern Adriatic coast, reported a positive molecular diagnosis of CeMV. In one-third of the CeMV-positive cetaceans submitted to a histological evaluation, a chronic form of the infection (detectable viral antigen, the absence of associated lesions, and concomitant coinfections) was suspected. Tissues from 24 animals were used to characterize the strain, obtaining 57 sequences from phosphoprotein, nucleocapsid, and fusion protein genes, which were submitted to GenBank. Our sequences showed the highest identity with NE-Atlantic strain sequences, and in the phylogenetic study, they clustered together with them. Regarding age and species, most of these individuals were adults (17/24, 70.83%) and striped dolphins (19/24, 79.16%). This study improves our understanding on the NE-Atlantic CeMV strain in the Italian waters, supporting the hypothesis of an endemic circulation of the virus in this area; however, additional studies are necessary to deeply comprehend the epidemiology of this strain in the Mediterranean Sea.

 Acceso libre al artículo

Vargas-Castro I, Peletto S, Mattioda V, Goria M, Serracca L, Varello K, Sánchez-Vizcaíno JM, Puleio R, Nocera FD, Lucifora G, Acutis P, Casalone C, Grattarola C, Giorda F.

Epidemiological impacts of attenuated African swine fever virus circulating in wild boar populations

Nuevo artículo publicado en la revista Research in Veterinary Science.

Resumen: African swine fever virus (ASFV) genotype II has been present in wild boar in the European Union since 2014. Control measures have reduced the incidence of the ASF, but highly virulent as well as attenuated ASFV strains continue to circulate. We present the intraherd epidemiological parameters of low and highly virulent ASFV in wild boar from experimental data, and for the first time, evaluate the impact of attenuated strain circulation through unique deterministic compartmental model simulations under various potential scenarios and hypotheses.

Using an estimated PCR infectious threshold of TPCR = 36.4, we obtained several transmission parameters, like an Rx (experimental intraherd R0) value of 4.5. We also introduce two novel epidemiological parameters: infectious power and resistance power, which indicate the ability of animals to transmit the infection and the reduction in infectiousness after successive exposures to varying virulence strains, respectively.

The presence of ASFV attenuated strains results in 4–17% of animals either remaining in a carrier state or becoming susceptible again when exposed to highly virulent ASFV for more than two years. The timing between exposures to viruses of different virulence also influences the percentage of animals that die or remain susceptible.

The findings of this study can be utilized in epidemiological modelling and provide insight into important risk situations that should be considered for surveillance and future potential ASF vaccination strategies in wild boar.

Martínez M, Bosch J, Ivorra B, Ramos AM, Ito S, Barasona JA y Sánchez-Vizcaíno JM

 Acceso al artículo