Estádios evolutivos de tripanossomas de Hipostomus punctatus Valenciennes (Osteichthyes, Loricariidae) em infecção natural de Batracobdella gemmata Blanchard (Hirudinea, Glossiphoniidae)

D’Agosto, Marta; Serra-Freire, Nicolau Maués

doi:10.1590/s0101-81751993000300008

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…Fish with these problems are rejected by middlemen due to their poor prices on the market, which raises an additional environmental concern about where the rejected specimens are released. These leeches act as a vector of the trypanosome parasite (D'Agosto and Serra-Freire, 1993), threatening sustainability due to the transmission of disease.…”

Section: Discussionmentioning

confidence: 99%

Is there sustainability for “satellite” ornamental fishing regions? A case study of Guamá River basin- Pará -Brasil

et al. 2020

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Section: Discussionmentioning

confidence: 99%

Is there sustainability for “satellite” ornamental fishing regions? A case study of Guamá River basin- Pará -Brasil

et al. 2020

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“…In South America, reports of trypanosomiasis are common in several armored fish species (Eiras et al, 1989;Eiras et al, 1990;D'Agosto and Serra-Freire, 1993;Fujimoto et al, 2013;Lemos and Souto-Padrón, 2014;Lemos et al, 2015;Molina et al, 2016;Corrêa et al, 2016), Petenia kraussii (Grögl et al, 1980), catsharks (Morillas et al, 1987;Silva et al, 2005), and in tuvira (Pádua et al, 2011), highlighting that in all these cases, the hosts are wild fish. The most relevant reports of trypanosomiasis in farmed fish are related to groupers in China (Chong, 2005;Su et al, 2014;Wang et al, 2015), and to our knowledge, only Hamid and Babiker (2011) have reported Trypanosoma infections in cultured Nile tilapia Oreochromis niloticus (Sudan).…”

Section: Introductionmentioning

confidence: 99%

Trypanosomiasis causing mortality outbreak in Nile tilapia intensive farming: Identification and pathological evaluation

et al. 2018

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Trypanosomes are flagellated parasite protozoans that prey especially on wild fish and have recently been described affecting fish in aquaculture. The present study was carried out during a mortality outbreak of Nile tilapia Oreochromis niloticus reared in net cages. Samples of 10 fish in the finishing phase showing unspecific signs, such as anorexia, skin darkening and gill paleness, were analyzed using hemogram, parasitology, microbiology, histopathology, electron microscopy and molecular identification. For microbiological analysis, the kidney was collected aseptically and cultured on tryptone soy agar for 48 h at 30°C. For parasitological analysis, skin, gills, intestinal contents and blood scrapings were examined. Photomicrographs of the parasite were measured. For molecular identification, blood samples were processed and sequenced for amplification of the 18S rDNA gene. Gills, liver, spleen, kidney, heart and intestine were sampled for histopathological processing. The microbiological results indicated that the fish were not infected with bacteria. Scrapings of the skin and gills revealed the massive presence of kinetoplastids, which were also observed in greater numbers than erythrocytes in the blood. Intestines were not affected by endoparasites. The morphometric characteristics indicated the presence of the Trypanosoma genus, which was confirmed in the sequenced samples, where 95% and 98% of the identity were Trypanosoma sp. In histopathology, all organs presented different levels of alteration, accompanied by large numbers of the parasite in small and large vessels. The main findings were the description of mast cell infiltrates in the gill and intestine, as well as multifocal aggregates of melanomacrophages in the liver, pancreas, spleen and kidney. Furthermore, the study addresses the newest features of clinical signs of infected fish and possible causes of infestations and compares the diagnosis of this hemoparasite with other hemoflagellates. To our knowledge, this study represents the first outbreak of Trypanosoma in Nile tilapia in South America. The authors warn of possible new cases of trypanosomiasis in aquaculture, recommending possible forms of containment and biosecurity measures.

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Checklist of Protozoan parasites of fishes from Brazil

Eiras

Takemoto

Pavanelli

et al. 2012

Zootaxa

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Provided is a list of the protozoan parasites of freshwater and marine fishes from Brazil. This report includes informationabout the site of infection, host habitat, localities and references of 100 parasite species (1 amoeba, 70 flagellates, 13 api-complexa and 16 ciliates) distributed among 112 different host species, mainly from freshwater. It is concluded that thediversity of protozoan parasites from Brazilian fish is understudied, and it is suggested that appropriate measures be taken in the research efforts to increase studies on the diversity of Protozoans parasites of fish from Brazil.

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Estádios evolutivos de tripanossomas de Hipostomus punctatus Valenciennes (Osteichthyes, Loricariidae) em infecção natural de Batracobdella gemmata Blanchard (Hirudinea, Glossiphoniidae)

Cited by 7 publications

References 7 publications

Is there sustainability for “satellite” ornamental fishing regions? A case study of Guamá River basin- Pará -Brasil

Is there sustainability for “satellite” ornamental fishing regions? A case study of Guamá River basin- Pará -Brasil

Trypanosomiasis causing mortality outbreak in Nile tilapia intensive farming: Identification and pathological evaluation

Checklist of Protozoan parasites of fishes from Brazil

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