Tennessee Department of Health, Vector-Borne Diseases Section, Communicable and Environmental Diseases, Nashville, USA.
Am J Trop Med Hyg. 2011 Oct;85(4):718-23. doi: 10.4269/ajtmh.2011.10-0583.
Rocky Mountain spotted fever, Lyme disease, and ehrlichiosis are tick-borne diseases that are reported annually in Kentucky. We conducted a survey to describe infection prevalence of tick-borne pathogens in Amblyomma americanum and Dermacentor variabilis ticks collected in Kentucky. During 2007-2008, we collected 287 ticks (179 D. variabilis and 108 A. americanum) from canine, feral hog, horse, raccoon, white-tailed deer, and human hosts in six counties in Kentucky. Ticks were screened for Rickettsia spp., Borrelia spp., and Ehrlichia spp. by using polymerase chain reaction. Forty-one (14.3%) ticks (31 A. americanum and 10 D. variabilis) were polymerase chain reaction-positive for a Rickettsia spp. Fourteen (4.9%) ticks (6 A. americanum and 8 D. variabilis) were positive for E. chaffeensis, and 4 A. americanum (1.4%) were positive for E. ewingii. One (0.4%) A. americanum was positive for Borrelia lonestari. Although Rocky Mountain spotted fever is diagnosed in Kentucky, no R. rickettsii was found in ticks in this study.
落矶山斑点热、莱姆病和埃立克体病是在肯塔基州每年报告的几种蜱传疾病。我们开展了一项调查,以描述在肯塔基州采集的美洲钝缘蜱和变异革蜱中蜱传病原体的感染流行情况。在 2007-2008 年期间,我们从肯塔基州六个县的犬、野猪、马、浣熊、白尾鹿和人类宿主身上采集了 287 只蜱(179 只变异革蜱和 108 只美洲钝缘蜱)。通过聚合酶链反应,对这些蜱进行了立克次体属、螺旋体属和埃立克体属的检测。41 只(14.3%)蜱(31 只美洲钝缘蜱和 10 只变异革蜱)的聚合酶链反应结果为立克次体属阳性。14 只(4.9%)蜱(6 只美洲钝缘蜱和 8 只变异革蜱)对 E. chaffeensis 呈阳性,4 只美洲钝缘蜱(1.4%)对 E. ewingii 呈阳性。1 只(0.4%)美洲钝缘蜱对 Borrelia lonestari 呈阳性。尽管在肯塔基州诊断出了落矶山斑点热,但在本研究中未在蜱中发现 R. rickettsii。