Kudoa amazonica n. sp. (Myxozoa; Multivalvulida), a parasite of the esophageal musculature of the freshwater catfish, Hypophthalmus marginatus (Siluriformes: Pimelodidae), from a river of the Amazon region. (May 2019)

• Record Type: Journal Article
• Authors: Velasco, Michele; Sindeaux Neto, José Ledamir; Videira, Marcela; de Cássia Silva do Nascimento, Luciana; Gonçalves, Evonnildo Costa; Matos, Edilson
• Is Part Of: Microbial pathogenesis. Volume 130(2019)
• Page Start: 247
• Page End: 252
• Publication Date: 2019-05
• Subjects: Amazonia -- Fish -- Myxosporidian -- Muscle; Pathogenic microorganisms -- Periodicals; Pathology, Molecular -- Periodicals; Communicable Diseases -- microbiology -- Periodicals; Communicable Diseases -- parasitology -- Periodicals; Micro-organismes pathogènes -- Périodiques; Pathologie moléculaire -- Périodiques; Electronic journals; 616.9041
• DOI: 10.1016/j.micpath.2019.03.017
• Languages: English
• ISSNs: 0882-4010

Abstract

Abstract: The class Myxozoa is a group of spore-producing eukaryote organisms that parasitize both freshwater and marine fish. The multivalvulide myxosporidian parasites of the genus Kudoa infect primarily the musculature of the fish host, some species are producing enzymes (proteases) capable of digesting muscle fibers. In the present study, 50 specimens of the freshwater catfish Hypophthalmus marginatus were collected from the Tocantins River in Pará, Brazil, and were analyzed. Overall, 68% of these specimens presented infections by Kudoa parasite in the esophageal musculature. The morphology of these parasite was examined under light microscopy and nucleotide sequences of the SSU rDNA gene were obtained for phylogenetic analyses. The species formed numerous whitish pseudocysts containing square spores with rounded extremities in the apical view, and four polar capsules of equal size. In the phylogenetic analyses, Kudoa amazonica n. sp. was characterized as a sister taxon of another freshwater species, Kudoa orbicularis . The combination of morphological, morphometric, and molecular data obtained in the present study provided a conclusive diagnosis of Kudoa amazonica n. sp., which is clearly distinct from all other Kudoa taxa described to date. Graphical abstract: Image 1 Highlights: Kudoa amazonica sp. n., a parasite of the esophagus. A freshwater fish parasite. Description of a new species of the genus Kudoa .