Tickborne diseases are rare in Washington, USA, and the ecology of these pathogens is poorly understood. We integrated surveillance data from humans and ticks to better describe their epidemiology and ecology. During 2011–2016, a total of 202 tickborne disease cases were reported in Washington residents. Of these, 68 (34%) were autochthonous, including cases of Lyme disease, Rocky Mountain spotted fever, tickborne relapsing fever, and tularemia. During May 2011–December 2016, we collected 977 host-seeking ticks, including Ixodes pacificus, I. angustus, I. spinipalpis, I. auritulus, Dermacentor andersoni, and D. variabilis ticks. The prevalence of Borrelia burgdorferi sensu stricto in I. pacificus ticks was 4.0%; of B. burgdorferi sensu lato, 3.8%; of B. miyamotoi, 4.4%; and of Anaplasma phagocytophilum, 1.9%. We did not detect Rickettsia rickettsii in either Dermacentor species. Case-patient histories and detection of pathogens in field-collected ticks indicate that several tickborne pathogens are endemic to Washington.

壁虱病在美国华盛顿很少见，对这些病原体的生态学知之甚少。我们整合了来自人类和壁虱的监测数据，以更好地描述其流行病学和生态学。在2011-2016年期间，华盛顿居民共报告202例tick传病病例。其中68例（34％）是土生土长的，包括莱姆病，落基山斑点热，壁虱传播性发热和Tularemia。2016年5月2011年12月，我们收集了977主机寻求蜱，包括硬蜱pacificus，一个angustus，一spinipalpis，一个auritulus，安氏革蜱，和D.栎蜱。伯氏疏螺旋体的流行太平洋I.ticus strict中的sensu stricto为4.0％；的博氏疏螺旋意义上拉托，3.8％; 占宫本芽孢杆菌的4.4％; 吞噬性无浆细胞为1.9％。我们在这两个Dermacentor物种中均未检测到立克次体立克次体。病史和野外采集的s中病原体的检测表明华盛顿有几种tick传播的病原体。