Multiparasitism in gills of Metynnis lippincottianus from the environmental protection area of Curiaú river, Eastern Amazon

Carvalho, Abthyllane Amaral de; Ferreira, Roger Leomar da Silva; Araújo, Priscila Gomes de; Negrão, Márcio Charles da Silva; Videira, Marcela Nunes

doi:10.1590/0103-8478cr20190028

Cited by 1 publication

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References 43 publications

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“…Among the parasites that cause morphological and physiological damage to members of the genus Metynnis are the species belonging to the subphylum Myxozoa Grassé, 1970(de Carvalho et al 2019, made up of the classes Malacosporea (Canning et al 2000) and Myxosporea Bütschli, 1881. The latter present more than 65 genera, notably the myxobolids, which include the genera Myxobolus Bütschli, 1882 and Henneguya Thélohan, 1892, with the largest number of species described, mainly in fish (Lom and Dyková 2006).…”

Section: Introductionmentioning

confidence: 99%

Henneguyosis in gills of Metynnis hypsauchen: an Amazon freshwater fish

et al. 2019

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This study describes aspects of infection caused by Myxozoa of the genus Henneguya sp. in gills of fish belonging to the species Metynnis hypsauchen. Two sampling were made in the Capim river, close to the Ribeira community, in the municipality of Ipixuna do Pará, State of Pará, Brazil, during the months of August 2018 and March 2019. The animals were captured and transported live to the Laboratório de Pesquisa Carlos Azevedo, at the Universidade Federal Rural da Amazônia (UFRA), in Belém, Pará, Brazil. The animals were examined, and after parasitism was confirmed, Differential Interference Contrast Microscopes were used, to evaluate the parasite spores. Ziehl-Neelsen stain techniques were used in histology. Necroscopic analyses of Metynnis hypsauchen specimens found parasites in 80% of the hosts (16/20), with whitish-colored cysts in the branchial filaments, containing mature spores of the genus Henneguya. The histopathological analysis indicated large areas with cystic lesions with associated ischemic necrosis. The descriptions from this study indicate that the parasite drastically compromises the host's respiratory system. Additionally, it is worth noting that parasite fauna studies of fishes in the Capim river are still a vast topic for research; this is the first record of infection by Henneguya sp. in Metynnis hypsauchen, captured in the Capim river in Ipixuna do Pará.

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Section: Introductionmentioning

confidence: 99%