Development of an Effective Oral Vaccine Dissemination Strategy against Classical Swine Fever for Wild Boar in Gifu Prefecture, Japan

In September 2018, classical swine fever (CSF) reemerged in Japan after more than a quarter of century. After the first notification on pig farm, wild boars positive for CSF were found continuously surrounding area. Gifu was prefecture to disseminate oral vaccines March 2019, with spread approximately 14,000 sites between 2019 and 2020. While these diligent measures seemed have shown some effectiveness, several vaccine spray remained without boar emergence. Based dissemination records from periods, this study conducted statistical analysis propose effective sites. First, generalized linear mixed model used identify factors correlated Then, two spatial interpolation methods, inverse distance weighted (IDW) Kriging, adopted create probability map emergence entire Prefecture. The showed correlation appearance raccoons, raccoon dogs, crows as well road density distribution index. particular, (OR: 1.83, 95%CI: 1.25–2.68, p < 0.001), dog 1.81, 1.25–2.66, id="M2"> medium level 1.56, 1.04–2.39, id="M3"> = 0.04) strongly approach resulted better prediction accuracy Kriging method IDW by root mean square error, but both approaches identified high area southeastern low central Gifu. Here we demonstrated tool effectively disperse wildlife.