Spatial and Functional Organization of Pig Trade in Different European Production Systems: Implications for Disease Prevention and Control

Understanding the complexity of live pig trade organization is a key factor to predict and control major infectious diseases, such as classical swine fever (CSF) or African swine fever (ASF). Whereas the organization of pig trade has been described in several European countries with indoor commercial production systems, little information is available on this organization in other systems, such as outdoor or small-scale systems. The objective of this study was to describe and compare the spatial and functional organization of live pig trade in different European countries and different production systems. Data on premise characteristics and pig movements between premises were collected during 2011 from Bulgaria, France, Italy, and Spain, which swine industry is representative of most of the production systems in Europe (i.e., commercial vs. small-scale and outdoor vs. indoor). Trade communities were identified in each country using the Walktrap algorithm. Several descriptive and network metrics were generated at country and community levels. Pig trade organization showed heterogeneous spatial and functional organization. Trade communities mostly composed of indoor commercial premises were identified in western France, northern Italy, northern Spain, and north-western Bulgaria. They covered large distances, overlapped in space, demonstrated both scale-free and small-world properties, with a role of trade operators and multipliers as key premises. Trade communities involving outdoor commercial premises were identified in western Spain, south-western and central France. They were more spatially clustered, demonstrated scale-free properties, with multipliers as key premises. Small-scale communities involved the majority of premises in Bulgaria and in central and Southern Italy. They were spatially clustered and had scale-free properties, with key premises usually being commercial production premises. These results indicate that a disease might spread very differently according to the production system and that key premises could be targeted to more cost-effectively control diseases. This study provides useful epidemiological information and parameters that could be used to design risk-based surveillance strategies or to more accurately model the risk of introduction or spread of devastating swine diseases, such as ASF, CSF, or foot-and-mouth disease.

La santidad compartida: la encrucijada del Islam y la ortodoxia cristiana en los Balcanes, reflejos en Bulgaria

In this doctoral thesis with the title: “The Shared Holiness: The crossroad of Islam and the Christian Orthodoxy in the Balkans, reflections in Bulgaria”, presented by VLADISLAVA SPASOVA ILIEVA, under the direction of Dr. MONTSERRAT ABUMALHAM MAS, and Dr. PEDRO BÁDENAS DE LA PEÑA, we reflect upon the crossroads between the populations in the Balkans, whose conversion into States was significantly influenced by their belonging to the Byzantine and the Ottoman Empires. Known as the crossroads of several cultures, the area was the destination of a massive influx of pagan Slaves, as well as the meeting point of Islam and Christianity. Considering the bidirectionality of the processes, we shall focus on the mutual enrichment brought about in the encounter between the religiosities of the Balkans, and we will discuss these points from different perspectives. In the common Balkan-Anatolian space, we turn our attention to the ancient hermits, with the aim of showing the complicity in the relations of coexistence, whether Islamic-Christian, Turkish-Byzantine, Turkish-Bulgarian, or Ottoman-Balkan, and a possible scheme, that could be valid for both social and spiritual growth of the person, as well as for the development of an ethnic or religious community, when sharing the same space with other populations, communities or ethnicities...