Programa de Pós-Graduação em Biologia Animal, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, RJ, 23897-000, Brazil.
Programa de Pós-Graduação em Ciências Veterinárias, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, RJ, 23897-000, Brazil.
Parasitol Res. 2021 Jul;120(7):2585-2593. doi: 10.1007/s00436-021-07140-9. Epub 2021 Apr 2.
Woodcreepers are passerines of the family Dendrocolaptidae, which have a high forest dependency. The current work aimed to redescribe Isospora striata McQuistion et al. 1997, from two new hosts in protected areas in Brazil, revealing new localities of parasitism, in addition to providing preliminary genotypic identifications via sequencing of the mitochondrial cytochrome c oxidase subunit 1 (COI) gene from both host species. Isospora striata has oocysts that are subspheroidal to ovoidal, 19.4 × 16.8 μm with smooth wall. Oocyst residuum is absent, but micropyle and polar granules are present. Sporocysts are ovoidal, 13.6 × 8.3 μm, with both Stieda and sub-Stieda bodies. Sporocyst residuum is present and sporozoites with refractile body, nucleus, and striations. The morphological study and the 100% similarity in sequencing of the COI gene between samples of different dendrocolaptid species confirmed the identification of a single species, supporting the identification of I. striata in the Brazilian Atlantic forest and consequently the wide distribution of this coccidian species in the Neotropical Region.
林鸲寄生虫是鸫科鸟类的寄生虫，对森林有高度的依赖性。本研究旨在重新描述 1997 年 McQuistion 等人描述的 Isospora striata，该寄生虫有两个新的宿主，均来自巴西的保护区，这揭示了新的寄生地点，此外，还通过对两种宿主物种的线粒体细胞色素 c 氧化酶亚基 1（COI）基因进行测序，提供了初步的基因型鉴定。Isospora striata 的卵囊呈亚球形到卵形，大小为 19.4×16.8μm，壁光滑。无卵囊残余物，但有微孢子和极粒。孢子囊呈卵形，大小为 13.6×8.3μm，具有 Stieda 和亚 Stieda 体。孢子囊残余物存在，孢子虫具有折射体、核和条纹。形态学研究和不同鸫科物种样本 COI 基因测序的 100%相似度证实了单一物种的鉴定，支持了巴西大西洋森林中 I. striata 的鉴定，因此该球虫在新热带地区广泛分布。
