US - Research conducted on behalf of the Swine Health Information Centre indicates shedding by infected swine of the agent responsible for Seneca Valley Virus will continue for a considerable period after the infection has cleared up, writes Bruce Cochrane.In response to a spike in Seneca Valley Virus cases in the US this past summer the Swine Health Information Center initiated research to determine distribution of the virus, identify pathogenicity and reasons for transmission, determine probable shedding times and immunity levels and assess the effectiveness of disinfectants.

　　布鲁斯·柯克伦(Bruce Cochrane)写道，据生猪健康信息中央研究统计数据的代表表示，尽管感染已经消除，但是塞内加谷病毒致使生猪流涎症状将持续很长一段时期。为了归应美国感染塞内加谷病毒案例的飙升，今年夏天生猪健康信息中央开始研究病毒的分布，断定致病性和感染缘故，约摸的流涎光阴、免疫等级和评估消毒剂的有效性。