Epidemiology of classical swine fever in pigs and wild animals
2019
Yamamoto, T. (National Institute of Animal Health, NARO (Japan). Viral Disease and Epidemiology Research Division)
Classical swine fever (CSF) is a viral infectious disease in pigs and wild boars which induces wide variety of clinical symptoms such as fever, anorexia, abortion and death. Due to its very high infectivity and lack of specific clinical feature, and by damaging the chance of international trades, it poses a severe damage to pig industry. In September 2018, CSF outbreak was discovered in a pig farm in Gifu Prefecture, Japan for the first time since the last case in 1992. After the first case was confirmed, CSF infected wild boars also started to be found because of the trap surveillance conducted nearby the infected farms or surveillance on wild boars found dead. Then the number of cases are still increasing in both pig farms and wild boars. A genomic analysis of the viral strain isolated from the infected farm revealed that the virus is distinct from that in the previous outbreak in Japan and similar to the strains found in the recent outbreaks in east Asian countries.
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