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Effects of Social Structure and Management on Risk of Disease Establishment in Wild Pigs

Contact heterogeneity among hosts determines invasion and spreading dynamics of infectious disease, thus its characterization is essential for identifying effective disease control strategies. Yet, little is known about the factors shaping contact networks in many wildlife species and how wildlife management actions might affect contact networks. Wild pigs in North America are an invasive, socially-structured species that pose a health concern for domestic swine given their ability to transmit numerous devastating diseases such as African swine fever (ASF). Using proximity loggers and GPS data from 48 wild pigs in Florida and South Carolina, USA, we employed a probabilistic framework to estimate weighted contact networks. We determined the effects of sex, social group, and spatial distribution (monthly home range overlap and distance) on wild pig contact. We also estimated the impacts of management-induced perturbations on contact and inferred their effects on ASF establishment in wild pigs with simulation. Social group membership was the primary factor influencing contacts. Between-group contacts depended primarily on space use characteristics, with fewer contacts among groups separated by >2 km and no contacts among groups >4 km apart within a month. Modeling ASF dynamics on the contact network demonstrated that indirect contacts resulting from baiting (a typical method of attracting wild pigs or game species to a site to enhance recreational hunting) increased the risk of disease establishment by ~33% relative to direct contact. Low-intensity population reduction (<5.9% of the population) had no detectable impact on contact structure but reduced predicted ASF establishment risk relative to no population reduction.

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Katerina Kolemishevska & Alexandria Shannon: The Funding Portal

Video: Katerina Kolemishevska & Alexandria Shannon: The Funding Portal

I’m Dr. Miranda Smit, and this is my first episode as co-host of The Swine it Podcast Show Canada! I’m thrilled to join you on this journey to bring insights and solutions to the Canadian pork industry. In this episode, Katerina Kolemishevska, from the Canadian Pork Council, and Alexandria Shannon, Senior Product Manager, Grants, Credits & Incentives Software at Ryan, introduce the new digital national platform for investment support to pork producers. This innovative tool, the Funding Portal, simplifies access to investments and incentives, empowering producers to invest in sustainability, innovation, and efficiency. Learn how it enables competitive farming practices and drives the pork industry toward a more sustainable future. Listen now on all major platforms!