Publicação
Understanding the dynamics of African swine fever spread at the interface between wild boar and domestic swine in Sweden
| Resumo: | African swine fever (ASF) is a viral disease with devastating consequences that is currently spreading across the Baltic States and Poland mainly driven by wild boar cases. Countries in Europe are urged to strengthen preparedness. In Sweden, a disease spread model has been used to evaluate the risk of transmission among domestic pigs, but further investigation is needed to assess the potential spill over of ASF virus from wild boars to the domestic pig population. This study aimed to characterize the opportunities for transmission of ASF in the interface between domestic pigs and wild boars in Sweden, providing a review of relevant information to carry out a qualitative assessment. A risk characterization using scenario trees was used, allowing similar characterizations in other countries. Five potential transmission pathways were identified: direct contact; indirect contact; infected swill; environmental contamination/local spread; vector borne transmission. The risks identified were: geographical overlap of both populations and the domestic pig outdoor access for direct contact; human risk activities and farm biosecurity for indirect contact; swill feed ban compliance for infected swill; distance, farm biosecurity and type for environmental contamination/local spread. This work provides a potential framework for a risk assessment of ASF in this interface, not only in Sweden but also in other countries. |
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| Autores principais: | Costa, João Filipe Dias Gomes de Morais |
| Assunto: | African swine fever wild boar domestic pig transmission interface risk characterization Peste Suína Africana javalí porco doméstico transmissão interface caracterização de risco |
| Ano: | 2017 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | African swine fever (ASF) is a viral disease with devastating consequences that is currently spreading across the Baltic States and Poland mainly driven by wild boar cases. Countries in Europe are urged to strengthen preparedness. In Sweden, a disease spread model has been used to evaluate the risk of transmission among domestic pigs, but further investigation is needed to assess the potential spill over of ASF virus from wild boars to the domestic pig population. This study aimed to characterize the opportunities for transmission of ASF in the interface between domestic pigs and wild boars in Sweden, providing a review of relevant information to carry out a qualitative assessment. A risk characterization using scenario trees was used, allowing similar characterizations in other countries. Five potential transmission pathways were identified: direct contact; indirect contact; infected swill; environmental contamination/local spread; vector borne transmission. The risks identified were: geographical overlap of both populations and the domestic pig outdoor access for direct contact; human risk activities and farm biosecurity for indirect contact; swill feed ban compliance for infected swill; distance, farm biosecurity and type for environmental contamination/local spread. This work provides a potential framework for a risk assessment of ASF in this interface, not only in Sweden but also in other countries. |
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