Laboratório de Doenças Parasitárias, Campus Ciências Agrárias, Universidade Federal do Vale do São Francisco, Univasf, Petrolina, PE, Brazil.
Laboratório de Doenças Parasitárias, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, FMVZ-USP, São Paulo, SP, Brazil.
Ticks Tick Borne Dis. 2018 Jul;9(5):1350-1353. doi: 10.1016/j.ttbdis.2018.06.005. Epub 2018 Jun 13.
Amblyomma rotundatum is an ixodid tick strictly associated with cold-blooded animals, among them the toad Rhinella jimi. This work aimed to evaluate the seasonal dynamics of larvae, nymphs, and adults of A. rotundatum parasitizing R. jimi in an area within the semi-arid Caatinga Biome of northeastern Brazil. Monthly sampling from February 2014 to January 2016 resulted in a total of 592 R. jimi toads captured and inspected for infestation by ticks, which were counted and identified. After the procedure, the toads were released with their ticks at the same capture site. During the study period, a total of 658 A. rotundatum were counted, comprising 497 larvae, 110 nymphs, and 51 females. The two-year mean abundances of larvae, nymphs, and adults were 0.84, 0.19, and 0.09, respectively. The two-year mean infestation intensities of larvae, nymphs, and adults were 3.65, 1.45, and 1.34, respectively. Comparing the monthly values of prevalence, mean abundance, and mean infestation intensity of A. rotundatum life stages, differences were observed between the first and second year of study; however, with no clear seasonal pattern.
扁虱属的环纹硬蜱严格与冷血动物有关，其中包括蟾蜍 Rhinella jimi。本工作旨在评估巴西东北部半干旱卡廷加生物群落中寄生在 R. jimi 上的 A. rotundatum 幼虫、若虫和成虫的季节性动态。2014 年 2 月至 2016 年 1 月进行的每月采样导致共捕获和检查了 592 只受蜱寄生的 R. jimi 蟾蜍，对蜱进行了计数和鉴定。在该过程之后，将蟾蜍及其蜱以相同的捕获点释放。在研究期间，共计数到 658 只 A. rotundatum，包括 497 只幼虫、110 只若虫和 51 只雌蜱。幼虫、若虫和成虫的两年平均丰度分别为 0.84、0.19 和 0.09。幼虫、若虫和成虫的两年平均感染强度分别为 3.65、1.45 和 1.34。比较 A. rotundatum 各生活阶段的患病率、平均丰度和平均感染强度的每月值，在研究的第一年和第二年之间观察到差异；然而，没有明显的季节性模式。
