Gastric coccidiosis in Thoracocharax stellatus caused by Goussia guamaensis n. sp. (Apicomplexa: Eimeriidae) from the Amazon region.
J Fish Dis
; 42(6): 905-912, 2019 Jun.
Article
in En
| MEDLINE
| ID: mdl-30933363
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.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Coccidiosis
/
Eimeriidae
/
Characiformes
/
Fish Diseases
/
Gastric Mucosa
Limits:
Animals
Country/Region as subject:
America do sul
/
Brasil
Language:
En
Journal:
J Fish Dis
Journal subject:
BIOLOGIA
/
MEDICINA VETERINARIA
Year:
2019
Document type:
Article
Affiliation country:
Brazil