engleski

Classical swine fever seroprevalence results in wild boars in year one (2009) and two (2010) after an outbreak

In Croatia, the last detection of CSF virus in wild boars was in 2008 in Sisak Moslavina County (SMC)and Vukovar Srijem County (VSC).This study presents our results of a thorough surveillance program regarding the County of origin, sex and age of wild boars investigated. During 2009, 4857 samples originating from wild boars have been tested at the Croatian Veterinary Institute for the presence of CSF virus and antibodies. Among these, 1233 samples originated from wild boars from the SMC and 683 from the VSC. In 2010, 8759 samples of wild boars were tested of which 2564 were collected in SMC and 902 in VSC. Most of the positive wild boars in 2009 were older than 2 years of age ; however, positive animals of one to two years of age were shown to be statistically significantly more frequent than positive animals up to one year of age (p<0.001). In 2010 there was no statistically significant difference recorded between the appearance of seropositive animals up to one year of age and from one to two years of age. Only an increase in seroprevalence was detected when compared to wild boars older than two years of age. Even though the same measures have been applied in both investigated Counties, a significant decrease since 2008 in the seroprevalence has been recorded only in VSC. This could be a result of more efficient control measures in an area where the hunting ground is fenced in comparison with the open hunting ground in the SMC. Therefore, additional measures, as oral vaccination accompanied by a surveillance program would be recommended for the control of CSF in the SMC.

seroprevalence; wild boars; outbreak

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