Ghosh Parna, Saleh Meriam N, Sundstrom Kellee D, Ientile Michelle, Little Susan E
Department of Veterinary Pathobiology, College of Veterinary Medicine, Oklahoma State University, Stillwater, Oklahoma, USA.
Vector Borne Zoonotic Dis. 2021 Jan;21(1):11-19. doi: 10.1089/vbz.2020.2637. Epub 2020 Sep 28.
spp. are commonly found on dogs and cats throughout the world. In the eastern United States, sequence of , the predominant species, reveals two clades-American and Southern. To confirm the species and clades of spp. ticks submitted from pets, we examined ticks morphologically and evaluated sequence from 500 ticks submitted from 253 dogs, 99 cats, 1 rabbit, and 1 ferret from 41 states. To estimate pathogen prevalence, of () stricto and of () were amplified and sequenced. Most spp. from the Northeast ( = 115/115; 100%) and the Midwest ( = 77/80; 96.3%) were , American clade. spp. were identified in 34 of 192 (17.8%) and in 5 of 192 (2.6%) . Two and one were identified from Ohio, Illinois, and Michigan. In contrast, 156 of 261 (59.8%) spp. from the Southeast were , American clade; 86 of 261 (33.0%) were , Southern clade; 9 of 261 (3.4%) were ; and 10 of 261 (3.8%) were . Southern clade was significantly more common in Florida and less common in the upper South ( < 0.0001). One (1/242; 0.4%) from the Southeast (Kentucky) tested positive for and 6 of 242 (2.5%) were positive for . In the West, most (34/44; 77.3%) spp. were , with ( = 6) submitted from dogs in Alaska, Washington, and Oregon and ( = 4) preliminarily identified from a dog in Montana. Pathogens were not detected in any ticks from the West. Although , American clade, predominated in the Northeast and Midwest, additional spp. were found on dogs and cats in other regions and pathogens were less commonly detected. The role of less common spp. as disease vectors, if any, warrants continued investigation.
蜱虫种类在世界各地的狗和猫身上普遍存在。在美国东部，主要种类的序列显示出两个分支——美国分支和南方分支。为了确认从宠物身上提交的蜱虫种类和分支，我们对蜱虫进行了形态学检查，并对来自41个州的253只狗、99只猫、1只兔子和1只雪貂提交的500只蜱虫的序列进行了评估。为了估计病原体的流行率，对狭义的某蜱种和另一种蜱种进行了扩增和测序。来自东北部（n = 115/115；100%）和中西部（n = 77/80；96.3%）的大多数蜱虫种类是美国分支的某蜱种。在192只蜱虫中有34只（17.8%）被鉴定为另一种蜱虫，在192只中有5只（2.6%）被鉴定为又一种蜱虫。从俄亥俄州、伊利诺伊州和密歇根州鉴定出了两只某蜱虫和一只又一种蜱虫。相比之下，来自东南部的261只蜱虫中有156只（59.8%）是美国分支的某蜱种；261只中有86只（33.0%）是南方分支的某蜱种；261只中有9只（3.4%）是另一种蜱虫；261只中有10只（3.8%）是又一种蜱虫。南方分支在佛罗里达州明显更常见，在上南部则不太常见（P < 0.0001）。来自东南部（肯塔基州）的一只蜱虫（1/242；0.4%）检测出某病原体呈阳性，242只中有6只（2.5%）对另一种病原体呈阳性。在西部，大多数（34/44；77.3%）蜱虫种类是某蜱种，其中6只（n = 6）是从阿拉斯加、华盛顿和俄勒冈州的狗身上提交的，4只（n = 4）初步鉴定是来自蒙大拿州一只狗身上的。在西部的任何蜱虫中都未检测到病原体。尽管美国分支的某蜱种在东北部和中西部占主导地位，但在其他地区的狗和猫身上发现了更多的蜱虫种类，并且病原体的检测较少。不太常见的蜱虫种类作为疾病传播媒介的作用（如果有的话）值得继续研究。
