epidemiologic and phylogenetic characteristics of porcine reproductive and respiratory syndrome viruses in conventional swine farms of jeju island as a candidate region for prrsv eradication.jeju island is the biggest island in korea. the imports of pigs or their relatives from mainland korea to this island has been banned since 1998. with this unique geographical and epidemiological context, epidemiology of porcine reproductive and respiratory syndrome virus (prrsv) was investigated on the island. while all investigated farms showed 100% of seropositive rate for prrsv, pigs on 37.2% (16/43) of the farms had viremia with type ii prrsv. the seropositive and viremia-positive rates for ...201121771286
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