title: Prevalence of classical swine fever virus in domestic pigs in South Korea: 1999-2011.
abstract: The major policy for eradication of classical swine fever (CSF) in South Korea has focused on the implementation of compulsory vaccination of the susceptible pig population. A vaccine strain of CSF virus, the LOM strain, is used to maintain high herd seroconversion, a practice complementary to the 'stamping-out policy' and restriction of animal movement during disease outbreaks. To survey for the prevalence of CSF in domestic pigs in South Korea over the past 13 years (1999-2011), we tested 4 193 782 and 1 162 645 samples for antibodies and antigens, respectively. Whereas seropositivity for CSF antibodies has been maintained at over 95% in the mainland, in Jeju Island, where no-vaccination has been administered since 1999, seroprevalence has been below 1% during the last 3 years of study (2009-2011). The highest number of outbreaks in South Korea occurred in 2002 and 2003; since then, outbreaks have decreased each year, with the last CSF outbreak recorded in 2009. No outbreaks have occurred during the past 3 years, and a high level of herd immunity has been maintained in the mainland pig population for 8 years; therefore, South Korea could now switch to a no-vaccination policy throughout the country. However, the constant threat of the re-emergence of the disease in the susceptible pig population should be the main consideration in planning and carrying out the last phase of the CSF eradication process.
authors.affiliation: Virus Disease Division, Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Gyeonggi-do, Korea.
authors.forename: J-Y
authors.initials: JY
authors.lastname: Song
authors.forename: S I
authors.initials: SI
authors.lastname: Lim
authors.forename: H Y
authors.initials: HY
authors.lastname: Jeoung
authors.forename: E-J
authors.initials: EJ
authors.lastname: Choi
authors.forename: B-H
authors.initials: BH
authors.lastname: Hyun
authors.forename: B
authors.initials: B
authors.lastname: Kim
authors.forename: J
authors.initials: J
authors.lastname: Kim
authors.forename: Y-K
authors.initials: YK
authors.lastname: Shin
authors.forename: R C
authors.initials: RC
authors.lastname: Dela Pena
authors.forename: J B
authors.initials: JB
authors.lastname: Kim
authors.forename: H
authors.initials: H
authors.lastname: Joo
authors.forename: D J
authors.initials: DJ
authors.lastname: An
mesh_terms: D000818:Animals; D006691:Classical Swine Fever / Q000453:epidemiology* / Q000517:prevention & control / Q000821:virology; D006692:Classical Swine Fever Virus / Q000276:immunology / Q000302:isolation & purification*; D004196:Disease Outbreaks / Q000517:prevention & control / Q000662:veterinary*; D015995:Prevalence; D056910:Republic of Korea / Q000453:epidemiology; D034421:Sus scrofa / Q000821:virology*; D013552:Swine; D014611:Vaccination / Q000662:veterinary; D014765:Viral Vaccines / Q000008:administration & dosage
chemical_list: D014765:Viral Vaccines