Instituto de Ciências Biomédicas and Faculdade de Medicina Veterinária, Universidade Federal de Uberlândia, Av. Pará, 1720, Campus Umuarama-Bloco 2T, Uberlândia, MG CEP 38400-902, Brazil.
Vet Parasitol. 2013 Oct 18;197(1-2):312-7. doi: 10.1016/j.vetpar.2013.06.018. Epub 2013 Jul 4.
Amblyomma parvum is a Neotropical tick that is widely spread and a potential vector of pathogens, including Rickettsiae. Genetic differences are remarkable between A. parvum populations from Brazil and Argentina. In this work, feeding and reproduction parameters of A. parvum ticks from these two populations were compared on some key host species to evaluate possible differences in host suitability between them. On the whole parameters of these tick populations were similar when fed on the same host and varied similarly on different host species. Still, bovines were more suitable host for Argentinian larvae than for Brazilian cohorts. It was observed that guinea pigs were the best host A. parvum immatures from both origins, as depicted from higher recovery rate of larvae and heavier engorged nymph weights. Canids and bovids were host species most suitable to adults of both tick populations as shown by the highest number of larvae produced by adult females that engorged on these hosts. Taken together, results showed that in spite of the genetic divergence, A. parvum from Argentina and Brazil have similar biological performance on various host species.
扁虱属的 Amblyomma parvum 是一种广泛分布的新热带蜱，也是病原体（包括立克次体）的潜在传播媒介。来自巴西和阿根廷的 A. parvum 种群之间存在显著的遗传差异。在这项工作中，比较了来自这两个种群的 A. parvum 蜱在一些关键宿主物种上的取食和繁殖参数，以评估它们之间宿主适宜性的可能差异。总的来说，当以相同的宿主为食时，这些蜱种群的参数相似，在不同的宿主物种上变化也相似。尽管如此，与巴西幼虫相比，阿根廷幼虫在牛身上的取食和繁殖情况更好。结果表明，豚鼠是来自两个来源的 A. parvum 幼体的最佳宿主，这从幼虫的更高回收率和更重的饱血若虫体重中可以看出。犬科和牛科是两种蜱种群成虫最适合的宿主，因为在这些宿主上饱血的成年雌虫产生的幼虫数量最多。总的来说，结果表明，尽管存在遗传分歧，但来自阿根廷和巴西的 A. parvum 在各种宿主物种上具有相似的生物学性能。
