Chagas-de-Souza Darlison, Silva Cláudia Regina, Alves-Coêlho Tássio, Bassini-Silva Ricardo, Jacinavicius Fernando de Castro, Labruna Marcelo Bahia, Viana Lúcio André
Programa de Pós-graduação em Biodiversidade Tropical, Universidade Federal do Amapá - UNIFAP, Macapá, AP, Brasil.
Laboratório de Estudos Morfofisiológicos e Parasitários, Departamento de Ciências Biológicas e da Saúde, Universidade Federal do Amapá - UNIFAP, Macapá, AP, Brasil.
Rev Bras Parasitol Vet. 2025 Aug 25;34(3):e005125. doi: 10.1590/S1984-29612025044. eCollection 2025.
The genus Amblyomma has the largest number of tick species in the Neotropical region. Amblyomma ovale displays high ecological plasticity and can be found in different habitats and a variety of vertebrate hosts. Small mammals of the family Echimyidae have been identified as hosts for this species. However, studies investigating their role as hosts of these ticks in the Amazon region are lacking. The present study aims to record the parasitic association between A. ovale and a Echimyidae species (Proechimys cuvieri) in the extreme north of the Brazilian Amazon, providing information about the research of potentially pathogenic organisms. Eight nymphs were collected and subjected to taxonomic and molecular identification, and pathogen screening was performed on the family Anaplasmataceae agents and the genera Bartonella, Coxiella, Hepatozoon, Mycoplasma, and Rickettsia. All the ticks were identified morphologically and molecularly as A. ovale, but PCR assays for pathogen detection showed no positive results for the target genes. This is the first time that A. ovale has been associated with P. cuvieri.
钝缘蜱属在新热带地区拥有数量最多的蜱种。卵形钝缘蜱表现出高度的生态可塑性，可在不同栖息地和多种脊椎动物宿主身上发现。棘鼠科的小型哺乳动物已被确定为该物种的宿主。然而，在亚马逊地区，关于它们作为这些蜱的宿主所起作用的研究尚缺。本研究旨在记录巴西亚马逊最北部卵形钝缘蜱与一种棘鼠科物种（库氏原鼠）之间的寄生关系，为潜在致病生物的研究提供信息。采集了八只若虫并进行分类和分子鉴定，对无形体科病原体以及巴尔通体属、柯克斯体属、肝簇虫属、支原体属和立克次体属进行了病原体筛查。所有蜱在形态和分子水平上均被鉴定为卵形钝缘蜱，但病原体检测的PCR分析显示目标基因无阳性结果。这是卵形钝缘蜱首次与库氏原鼠相关联。
