Dermocystidium sp. in the gills of farmed Oreochromis niloticus in Brazil

Steckert, Lilian Dordete; Cardoso, Lucas Guimarães; Tancredo, Karen Roberta; Martins, Maurício Laterça; Jerônimo, Gabriela Tomas

doi:10.1590/0001-3765201920180959

Cited by 7 publications

(7 citation statements)

References 15 publications

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“…The first was in wild catfish (Trichomycterus sp.) (Eiras & Silva-Souza, 2000), the second was in tambatingas (Fujimoto et al, 2018), and the third in O. niloticus, within the last year (Steckert et al, 2019). The histologic and clinical signs from I. punctatus analyzed in our study suggest a Dermocystidium sp.…”

Section: Discussionmentioning

confidence: 54%

Parasitological diagnosis in food fish produced in a fish farm, in the Zona da Mata, Minas Gerais, southeastern Brazil

Relvas

Balian

Soares

et al. 2020

Rev. Bras. Parasitol. Vet.

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This study identified the parasitic species in juvenile freshwater finfishes during the fattening stage, from a fish farm located in the Zona da Mata (MG), southeastern Brazil, and revealed both macro and microscopical lesions in fish gills. A total of 172 juvenile fishes of different species (Oreochromis niloticus, Ictalurus punctatus, Ctenopharyngodon idella, Cyprinus carpio, Astyanax bimaculatus and Brycon amazonicus) were transported to a laboratory in São Paulo city. The fish were sedated and then euthanized for parasitological analysis. All fish were infected by at least one parasite species. Ten different species of parasites were identified: Apiosoma sp., Epistylis sp., Ichthyobodo sp., trichodinids, Piscinoodinium pillulare, Ichthyophthirius multifiliis, Tetrahymena sp., monogeneans, Centrocestus formosanus metacercariae, and Dermocystidium sp. The best management practices and lack of sanitary control were also discussed.

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Section: Discussionmentioning

confidence: 54%

Parasitological diagnosis in food fish produced in a fish farm, in the Zona da Mata, Minas Gerais, southeastern Brazil

Relvas

Balian

Soares

et al. 2020

Rev. Bras. Parasitol. Vet.

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“…aureus × O . niloticus cultured in Brazil, Egypt and Israel 200–203 . Dermocystidium aegyptiacus El‐Mansy, 2008 was described from the intestines of O .…”

Section: Parasitic Infections Of Tilapiamentioning

confidence: 99%

A global review of problematic and pathogenic parasites of farmed tilapia

Shinn

Avenant‐Oldewage

Bondad‐Reantaso

et al. 2023

Reviews in Aquaculture

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Over the past 80 years, tilapia have been translocated globally for aquaculture; active production is recorded in >124 countries. Of 7 million tonnes of tilapia produced in aquaculture, 79% is from 79 countries outside the natural range of tilapia. Capture fisheries account for a further 723,627 tonnes of tilapia, and >47% of this is landed from established invasive populations outside Africa. Tilapias host a rich fauna of parasites, many of which have been translocated with their hosts. This review summarises >2500 host–parasite records from 73+ countries and >820 recorded tilapia translocations (provided in the supplementary materials). This work focuses on the notable pathogens that threaten the health of cultured populations of tilapia, providing a description of their pathology and includes species that also have substantial impacts on wild tilapia populations, where relevant. For each major parasite taxonomic group, we highlight which parasites have been translocated or have been acquired from the new environments into which tilapia have been introduced, together with remarks on standard treatment approaches and research on them and their management and control. Regarding the theme ‘Tilapia health: quo vadis?’, Africa has enormous potential for aquaculture growth, but substantial knowledge gaps about tilapia parasites in many African states remain, which creates associated production and biosecurity risks. For each parasitic group, therefore, the risks of parasite translocation to new regions as tilapia aquaculture industries expand are highlighted.

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“…Studies have been published on infection of the eel (Molnár & Sövényi, 1984; Wootten & McVicar, 1982). Moreover, there are publications from Africa and South America about dermocystidiosis as an emerging problem among cultured native and introduced fishes (Eiras & Silva‐Souza, 2000; El‐Mansy, 2008; Fujimoto et al., 2017; Steckert, Cardoso, Tancredo, Martins, & Jeronimo, 2019). More recently, Mahboub and Shaheen (2020) provided useful data on the prevalence, diagnosis and experimental challenge of Dermocystidium sp.…”

Section: Introductionmentioning

confidence: 99%

Infection of the Carpathian brook lamprey (Eudontomyzon danfordi Regan, 1911) with a dermocystid parasite in the Tisza River Basin, Hungary

Sellyei

Cech

Varga

et al. 2020

Journal of Fish Diseases

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The Carpathian brook lamprey (Eudontomyzon danfordi Regan, 1911) is an endemic protected species of Cephalaspidomorphi in the Carpathian Basin. No parasites have become known from these jawless vertebrates to date. Here, the authors describe an infection from a single specimen manifesting in protuberant skin cysts 7–10 mm in diameter, scattered on the body surface. Similar dermal infection was observed in 25 of the 274 lampreys recorded in the population survey. Skin cysts filled with round spore‐like structures of a dermocystid parasite were found. These particles measured 8–14 µm in diameter and had an about 0.5 µm thick wall, and containing mainly a granular mass and a relatively scarce plasma. No hyphae were recorded. Despite conspicuous morphological changes in the skin, no inflammatory reactions were found. The molecular analysis of 18S rDNA showed similarity to dermocystid species of several fish species but differed from them approximately by 2%. This is the first record of a dermocystid parasite infecting a jawless vertebrate.

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Dermocystidium sp. in the gills of farmed Oreochromis niloticus in Brazil

Cited by 7 publications

References 15 publications

Parasitological diagnosis in food fish produced in a fish farm, in the Zona da Mata, Minas Gerais, southeastern Brazil

Parasitological diagnosis in food fish produced in a fish farm, in the Zona da Mata, Minas Gerais, southeastern Brazil

A global review of problematic and pathogenic parasites of farmed tilapia

Infection of the Carpathian brook lamprey (Eudontomyzon danfordi Regan, 1911) with a dermocystid parasite in the Tisza River Basin, Hungary

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