Ocorrência de peste suína clássica crônica em suínos no Rio Grande do Norte

Abstract

Classical Swine Fever (CSF) is devastating virus disease of Suidae family. In this work, the outbreaks of PSC occurred in Rio Grande do Norte (RN) in 2009, were studied. The data were obtained during the campaign of eradication of CSF outbreaks by the State and Federal official teams. 12 CSF outbreaks distributed in Mossoró, Jucurutu and Macaíba municipalities were confirmed by official laboratory diagnoses. In Mossoró city the main clinical signs in CSF outbreaks were high fever, (>41oC), conjunctivitis, diarrhea, skin hemorrhages-cyanosis and reproductive disorders. Although, in Jucurutu municipality CSF virus infected pigs did not development skin hemorrhages-cyanosis and the CSF clinical signs were less severe. The indices of morbidity and mortality induced by CSF infection in pig herds varied of 3.6-100% and 1.8-98%, respectively. The variability of the finds of necropsy, clinical signs including reproductive disorders joint with indices of morbidity and mortality of CSF outbreaks in Mossoró and Jucurutu pointed to occurrence of CSF sub acute and chronic infection and suggested the virus population heterogeneity. The characteristics of CSF outbreaks joint epidemiological investigation in RN suggest primary CSF outbreak in Mossoró as the source of virus dispersed to Jucurutu municipalities.