Prevalence of antibodies against equine viral arteritis virus in Northwest, Western Central and North Central Regions of the State of Paraná, Brazil

ABSTRACT: The prevalence of antibodies against equine viral arteritis virus (EVAV) in healthy horses raised in Northwest, Western Central and North Central regions of the State of Paraná, Brazil was investigated. According to calculated sample size, serum samples of 653 horses were analyzed through standard virus neutralization test. No horse had antibodies to EVAV in Northwest (0/236) and in Western Central (0/99) regions. In North Central region frequency was 0.62% (2/318), with an overall prevalence of 0.30%. It can be concluded that EVA does not represent a problem of epidemiological importance in the studied regions of Paraná.

摘要：本研究针对巴西巴拉那州西北部、中西部西部及中北部地区饲养的健康马匹，调查其马病毒性动脉炎病毒（equine viral arteritis virus, EVAV）抗体的流行情况。根据估算的样本量，采用标准病毒中和试验对653份马匹血清样本开展检测。结果显示，西北部（0/236）与中西部西部（0/99）地区的马匹均未检出EVAV抗体；中北部地区的抗体检出率为0.62%（2/318），整体流行率为0.30%。综上可得出结论：在本次研究涉及的巴拉那州各区域内，马病毒性动脉炎（equine viral arteritis, EVA）未构成具有流行病学重要性的疫病问题。