Gastric coccidiosis in Thoracocharax stellatus caused by Goussia guamaensis n. sp. (Apicomplexa: Eimeriidae) from the Amazon region. Issue 6 (1st April 2019)

• Record Type: Journal Article
• Authors: da Silva, Marcelo F.; de Araújo, Rebeca S.; da Silva, Diehgo T.; Sanches, Osimar; Hamoy, Igor; Matos, Edilson
• Is Part Of: Journal of fish diseases. Volume 42:Issue 6(2019)
• Page Start: 905
• Page End: 912
• Publication Date: 2019-04-01
• Subjects: Amazon region -- Brazil -- Coccidia -- SSU rDNA; Fishes -- Diseases -- Periodicals; 639.3
• DOI: 10.1111/jfd.12992
• Languages: English
• ISSNs: 0140-7775

Abstract

Abstract: Ninety‐seven specimens of spotfin hatchetfish, Thoracocharax stellatus, an ornamental freshwater species from the Amazon basin, were captured in the basin of the Guamá River in the municipality of Belém, in northern Brazil, and analysed for coccidiosis infection. Overall, 26 of the specimens were infected by apicomplexan parasites of the genus Goussia, with unsporulated forms being found in the gastric epithelium and sporulated forms in the intestinal lumen. The spheroid oocysts (mean diameter: 13.2 ± 1.7 μm) have four elliptical sporocysts. A partial sequence of the SSU rDNA of the new species was obtained, which contained 1, 121 base pairs, with 43.8% guanine + cytosine (G + C), and the bases distributed as follows: A = 28.1%, C = 18.3%, G = 25.5% and T = 28.1%. The combined analysis of the morphometric and phylogenetic evidence confirmed that the specimens represented the genus Goussia and were allocated to a new species, Goussia guamaensis n. sp., which is described here.