Wyckoff A Christy, Henke Scott E, Campbell Tyler A, Hewitt David G, VerCauteren Kurt C
Caesar Kleberg Wildlife Research Institute, Texas A&M University, Kingsville, Texas 78363, USA.
J Wildl Dis. 2009 Apr;45(2):422-9. doi: 10.7589/0090-3558-45.2.422.
Feral swine (Sus scrofa) are present in 38 of the 50 United States, and their populations continue to expand. Domestic swine are widely regarded as vulnerable to diseases harbored by feral swine. Our objectives were to determine antibody prevalence for selected pathogens in Texas feral swine populations and identify contact events between feral and domestic swine. Overall prevalence of antibodies against brucellosis and pseudorabies virus was 11% and 30%, respectively. Antibodies to porcine reproductive and respiratory disease virus were detected in 3% of feral swine from southern Texas. All samples tested negative for antibodies to classical swine fever virus. To determine the frequency of contact events between feral swine and domestic swine in neighboring facilities, we analyzed movement data from 37 adult feral swine that were trapped < or =10 km from domestic swine facilities and equipped with geographic positioning system collars. Seven of the 37 feral swine had contact (relocated within 100 m) with domestic swine. We found that contact between feral swine and domestic swine occurred predominantly at night. Additionally, we analyzed 60 consecutive days of experimental track plots around pens that contained domestic swine and empty control pens, and found greater visitation by feral swine to the domestic swine pens. Our data demonstrate that feral swine have direct contact with domestic swine, which presents opportunity for disease transmission.
美国50个州中有38个州存在野猪（Sus scrofa），且其数量持续增长。家猪被广泛认为易感染野猪携带的疾病。我们的目标是确定德克萨斯州野猪种群中特定病原体的抗体流行率，并确定野猪与家猪之间的接触事件。布鲁氏菌病和伪狂犬病病毒抗体的总体流行率分别为11%和30%。在德克萨斯州南部3%的野猪中检测到猪繁殖与呼吸综合征病毒抗体。所有样本的经典猪瘟病毒抗体检测均为阴性。为了确定相邻设施中野猪与家猪之间接触事件的频率，我们分析了37头成年野猪的移动数据，这些野猪在距离家猪设施小于或等于10公里处被捕获，并佩戴了全球定位系统项圈。37头野猪中有7头与家猪有接触（重新安置在100米范围内）。我们发现野猪与家猪的接触主要发生在夜间。此外，我们分析了连续60天围绕有家猪的围栏和空对照围栏的实验轨迹图，发现野猪对家猪围栏的访问更为频繁。我们的数据表明，野猪与家猪有直接接触，这为疾病传播提供了机会。
