Soroprevalência da anemia infecciosa em equídeos do Pantanal, município de Poconé, estado de Mato Grosso, Brasil

Abstract

Sera of 547 equidae (500 equine and 47 mules) of 25 farms from a Pantanal region of Brazil were evaluated for Equine Anemia Virus (EIAV) by the agar gel immunodifusion test (AGID). Risk factors for EIAV infection and Spatial Lag Model were also evaluated per farm and animals. Positive reaction was detected in 134 (24.5%) equids dogs from 13 (52.0%) farms. Adjusted prevalence for animal was 31% (17.4-48.8 % 95% CI) and prevalence rates intra-herd ranged from 5.0 to 77.0% with an average prevalence value of 23.0% per infected herd. Analysis per farm showed that farms placed at the wetland area had 60 more chances to have a positive animal than farms from dry areas. According to the adjusted analysis of χ 2 tests, equids living in wetland areas had 146.4 more chances to be positive than equids that live in dry areas, and equids with clinical signs had 3.74 more chances to be positive than equids without clinical signs. Spatial Lag Model showed a negative spatial correlation between positive and negative farms and also indicated that farms located at the wetland area were associated with presence of positive equids. The results of the present work showed a high prevalence of EIA in the Pantanal area in Brazil demonstrating that the region remains as a great risk for infection.