Molecular and morphological analysis of Henneguya jundiai n. sp. (Cnidaria: Myxosporea), a new parasite of the gills of Rhamdia quelen in Brazil

Negrelli, Débora Caroline; Vieira, Diego Henrique Mirandola Dias; Tagliavini, Vinícius Panciera; Abdallah, Vanessa Doro; Azevedo, Rodney Kozlowiski de

doi:10.1016/j.actatropica.2019.105053

Cited by 13 publications

(3 citation statements)

References 57 publications

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“…The microscopic and ultramicroscopic characteristics of mature spores and prespore development stages of myxozoans form the main basis for classification of traditional myxozoans and one of the key methods for preliminary identification of clinical isolates. Mature spores of myxozoans are mainly composed of three parts: valve, sporoplasm and polar capsule 1,4,16,20 . T. kitauei in this study displayed similar structures in optical and scanning electron microscopy analyses as well as pathological sections.…”

Section: Discussionmentioning

confidence: 99%

“…For instance, Kudoa yasunagai 12,13 can infect Lateolabrax japonicus , Oplegnathus fasciatus , Seriola quinqueradiata , Takifugu rubripes , Thunnus orientalis and Plotosus lineatus , forming numerous cysts in the brain and causing disorders in swimming performance. Recent studies have shown that myxosporeans of fish are mostly host-specific parasites, typically infecting only one host species (oioxenic) or a limited number of closely related species (stenoxenic) 1,4,9,10 . In fact, the majority of freshwater myxosporeans are oioxenic or stenoxenic species.…”

Section: Introductionmentioning

confidence: 99%

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Pathological and immunological analyses of Thelohanellus kitauei (Myxozoa:Myxosporea) infection in the scattered mirror carp, Cyprinus carpio

Liu

Wei

Wang

et al. 2019

Sci Rep

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Thelohanellus kitauei is a spore-forming myxosporean parasite prevalent in scattered mirror carp (Cyprinus carpio) that generates numerous cysts in the intestine and causes mass mortality in fish. To investigate the infection and mortality induced by T. kitauei in pond-reared farms in Luo-Jiang (104°51’N, 31°31’E), southwest China, morphological and molecular analyses of infected fish were conducted. Natural and specific immune indicators were further evaluated to determine the immunological effects of response to parasitic infection. The infectious parasite was identified as Thelohanellus kitauei based on morphological, 18S rDNA and infectious characteristics. Scattered mirror carp was determined as the specific intermediate host of the parasite. However, T. kitauei still caused considerable damage to the fish, in particular, injury and blockage of the intestines, resulting in malnutrition and even death. The mature spores of T. kitauei colonize the intestinal submucosa of carp and form cysts of various sizes that block the intestinal tract and release spores into the enteric cavity upon rupture, leading to the next phase of T. kitauei growth. Moreover, T. kitauei-infected carp showed weaker innate immunity. IgM is involved in the fight against parasitic infection while cytokines, such as IL-6, IL-1β and TNF-α, had an impact on infection processes. To our knowledge, this is the first report to show that T. kitauei infects and causes death in scattered mirror carp. Our collective findings from systematic pathology, morphology and immunology experiments provide a foundation for further research on infections by this type of parasite and development of effective treatment strategies.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pathological and immunological analyses of Thelohanellus kitauei (Myxozoa:Myxosporea) infection in the scattered mirror carp, Cyprinus carpio

Liu

Wei

Wang

et al. 2019

Sci Rep

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“…It has distribution from the south of South America to the south of Mexico, being distributed in the regions of Brazil (Gomes et al, 2000). There are reports of these animals in the state of Goiás (Araújo & Tejerina-Garro, 2007), Rio de Janeiro (Venancio et al, 2010), Minas Gerais (Casatti & Castro, 2006), São Paulo (Negrelli et al, 2019), Paraná (Carvalho et al, 2022), Santa Catarina (Guerini et al, 2014) and Rio Grande do Sul (Corrêa et al, 2010), for example. It is an omnivorous species, whose sexual maturity is reached in the first year of life and has two reproductive peaks (spring and summer) (Montanha et al, 2011).…”

Section: Graphical Abstractmentioning

confidence: 99%

A multibiomarker approach to investigate paracetamol effects in the reproduction regulatory axis of a male Neotropical catfish Rhamdia quelen

Perussolo,

Vicentini,

Lyra

et al. 2023

Acta Limnol. Bras.

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Aim Paracetamol (PCM), or acetaminophen, is one of the most used drugs for human treatment of pain and fever. Since it has often been found in the aquatic environment, the aim of this study was to investigate the effects of PCM on the reproductive axis of male Rhamdia quelen catfish. Methods Different biomarkers were evaluated in hypothalamus, liver and gonads, as well as the plasma sexual hormone quantification. The fish were exposed to three PCM concentrations: 0.25, 2.5 and 25 µg.L-1 and to a control group (solvent acetone 0.0003%). After 14 days of exposure, fish were anesthetized, for blood sampling and biometrics, and after euthanasia, the tissues were sampled. Plasma was used for 11- keto testosterone and 17β - estradiol quantification. The hypothalamus was collected for brain aromatase (cyp19a1b) gene expression; the liver for the vitellogenin (vtg) gene expression and biochemical biomarkers; and gonad for the biochemical and histological biomarkers analyses. Results No alterations were observed in the hormone’s levels, sexual maturation level or in cyp19a1b and vtg gene expression. In the liver the non-protein thiols concentration increased at 2.5 µg.L-1 of PCM, and the superoxide dismutase (SOD) activity was reduced at 0.25 µg.L-1 of PCM. In gonads, glutathione S-transferase (GST) activity decreased and SOD activity increased at 25 µg.L-1 of PCM, while the glutathione peroxidase (GPx) activity reduced after exposure to both PCM concentrations. Conclusion The results showed that environmental concentrations of PCM can cause alterations in the antioxidant system, mainly in the gonads of R. quelen males. However, without significant change in the hormones levels or in the expression of genes related to the reproduction axis. These alterations occurred at concentrations already found in aquatic environment, including in Brazil.

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A new species, Henneguya lacustris n. sp. (Cnidaria: Myxosporea), infecting the gills of Astyanax lacustris from Brazil

et al. 2020

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Molecular and morphological analysis of Henneguya jundiai n. sp. (Cnidaria: Myxosporea), a new parasite of the gills of Rhamdia quelen in Brazil

Cited by 13 publications

References 57 publications

Pathological and immunological analyses of Thelohanellus kitauei (Myxozoa:Myxosporea) infection in the scattered mirror carp, Cyprinus carpio

Pathological and immunological analyses of Thelohanellus kitauei (Myxozoa:Myxosporea) infection in the scattered mirror carp, Cyprinus carpio

A multibiomarker approach to investigate paracetamol effects in the reproduction regulatory axis of a male Neotropical catfish Rhamdia quelen

A new species, Henneguya lacustris n. sp. (Cnidaria: Myxosporea), infecting the gills of Astyanax lacustris from Brazil

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