Herrin Brian H, Peregrine Andrew S, Goring Jonas, Beall Melissa J, Little Susan E
Department of Veterinary Pathobiology, Center for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK, USA.
Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.
Parasit Vectors. 2017 May 19;10(1):244. doi: 10.1186/s13071-017-2184-7.
Canine test results generated by veterinarians throughout Canada from 2013-2014 were evaluated to assess the geographical distribution of canine infection with Borrelia burgdorferi, Dirofilaria immitis, Ehrlichia spp., and Anaplasma spp.
The percent positive test results of 115,636 SNAP® 4Dx® Plus tests from dogs tested were collated by province and municipality to determine the distribution of these vector-borne infections in Canada.
A total of 2,844/115,636 (2.5%) dogs tested positive for antibody to B. burgdorferi. In contrast, positive test results for D. immitis antigen and antibodies to Ehrlichia spp. and Anaplasma spp. were low, with less than 0.5% of dogs testing positive for any one of these three agents nationwide. Provincial seroprevalence for antibodies to B. burgdorferi ranged from 0.5% (Saskatchewan)-15.7% (Nova Scotia); the areas of highest percent positive test results were in proximity to regions in the USA considered endemic for Lyme borreliosis, including Nova Scotia (15.7%) and Eastern Ontario (5.1%). These high endemic foci, which had significantly higher percent positive test results than the rest of the nation (P < 0.0001), were surrounded by areas of moderate to low seroprevalence in New Brunswick (3.7%), Quebec (2.8%), and the rest of Ontario (0.9%), as well as northward and westward through Manitoba (2.4%) and Saskatchewan (0.5%). Insufficient results were available from the westernmost provinces, including Alberta and British Columbia, to allow analysis.
Increased surveillance of these vector-borne disease agents, especially B. burgdorferi, is important as climate, vector range, and habitat continues to change throughout Canada. Using dogs as sentinels for these pathogens can aid in recognition of the public and veterinary health threat that each pose.
对2013 - 2014年加拿大各地兽医提供的犬类检测结果进行评估，以确定感染伯氏疏螺旋体、犬恶丝虫、埃立克体属和无形体属的犬类的地理分布情况。
按省份和城市整理了115,636份犬类SNAP® 4Dx® Plus检测的阳性结果百分比，以确定这些媒介传播感染在加拿大的分布情况。
共有2,844/115,636（2.5%）只犬类伯氏疏螺旋体抗体检测呈阳性。相比之下，犬恶丝虫抗原以及埃立克体属和无形体属抗体的阳性检测结果较低，全国范围内这三种病原体中任何一种检测呈阳性的犬类不到0.5%。伯氏疏螺旋体抗体的省级血清阳性率在0.5%（萨斯喀彻温省）至15.7%（新斯科舍省）之间；阳性检测结果百分比最高的地区靠近美国被认为是莱姆病地方病流行区的地区，包括新斯科舍省（15.7%）和安大略省东部（5.1%）。这些高流行病灶的阳性检测结果百分比显著高于加拿大其他地区（P < 0.0001），其周围是新不伦瑞克省（3.7%）、魁北克省（2.8%）以及安大略省其他地区（0.9%）血清阳性率为中到低的区域，向北和向西延伸至马尼托巴省（2.4%）和萨斯喀彻温省（0.5%）。包括艾伯塔省和不列颠哥伦比亚省在内的最西部省份的结果不足，无法进行分析。
随着加拿大各地气候、媒介分布范围和栖息地不断变化，加强对这些媒介传播疾病病原体，尤其是伯氏疏螺旋体的监测非常重要。将犬类作为这些病原体的哨兵有助于认识到它们各自对公众和兽医健康构成的威胁。
