BACKGROUND: @entity23006 ( @entity23006 ) has been a cause for great concern to the Danish @entity1707 industry since it was first diagnosed in 1992. The causative agent of @entity23006 is an RNA virus which is divided into different genotypes. The clinical signs, as well as its morbidity and mortality, is highly variable between herds and regions. Two different genotypes of @entity23006 virus ( @entity23007 ) are found in Denmark: type 1 and type 2. Approximately 40  % of Danish @entity1707 herds are seropositive for one or both @entity23007 types. The objective of this study was to describe the temporal trend and spatial distribution of @entity23007 in Danish @entity1707 herds from 2007 to 2010, based on type-specific serological tests from the @entity23006 surveillance and control program in Denmark using the results stored in the information management system at the National Veterinary Institute, Technical University of Denmark (DTU Vet). RESULTS: The average monthly seroprevalence of @entity23007 type 1 was 9  % (minimum of 5  %; maximum of 13  %) in breeding herds, and 20  % (minimum of 14  %; maximum of 26  %) in production herds; @entity23007 type 2 had an average seroprevalence of 3  % (minimum of 1  %; maximum of 9  %) in breeding herds and of 9  % (minimum of 5  %; maximum of 13  %) within production herds. The seroconversion rate followed a similar and consistent pattern, being higher for type 1 than for type 2 for both @entity23007 types. Regarding the spatiotemporal results, the relative risk distribution maps changed over time as a consequence of the changes in @entity23007 seroprevalence, suggesting a general decline in the extent of areas with higher relative risk for both type 1 and 2. Local spatial analysis results demonstrated the existence of statistically significant clusters in areas where the relative risk was higher for both herds. CONCLUSIONS: @entity23007 type 1 seroprevalence was constantly higher than for @entity23007 type 2 in both herd types. Significant spatial clusters were consistently found in Denmark, suggesting that @entity23007 is endemic in these areas. Furthermore, relative risk distribution maps revealed different patterns over time as a consequence of the changes in seroprevalence.

Spatial analysis and temporal trends of XXXX in Denmark from 2007 to 2010 based on laboratory submission data.

@entity1707 :: ('9823', 'Species') :: ['pig', 'swine'] @entity23007 :: ('28344', 'Species') :: ['PRRSV'] @entity23006 :: ('MESH:D019318', 'Disease') :: ['Porcine reproductive and respiratory syndrome', 'PRRS']
@entity23006 :: (MESH:D019318,Disease) :: ['porcine reproductive and respiratory syndrome']
