Identification and characterization of Sinuolinea niloticus from Nile tilapia (Oreochromis niloticus) farmed in Botucatu, Brazil

Myxozoans can induce losses in production of marine and freshwater fish. Recently, a new parasitic myxozoan species, Sinuolinea niloticus , was identified and its importance highlighted. This study aimed to investigate Sinuolinea niloticus and its macroscopic and microscopic alterations in Nile tila...

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Bibliographic Details
Published in:Aquaculture international 2020-10, Vol.28 (5), p.1899-1906
Main Authors: Battazza, Alexandre, da Silva Brasileiro, Felipe César, Machado, Eduardo Ferreira, de Matos, Magna Gomes, dos Santos, Cauê Bastos Tertuliano, Rodrigues, Marianna Vaz, do Nascimento, Diana, Rocha, Noeme Sousa
Format: Article
Language:English
Subjects:
Aquaculture
Biomedical and Life Sciences
Body organs
Degeneration
Fins
Fish
Fish culture
Fish farms
Freshwater
Freshwater & Marine Ecology
Freshwater fish
Freshwater fishes
Gills
Hepatocytes
Histopathology
Hyperplasia
Inland water environment
Life Sciences
Marine fish
Marine fishes
Oreochromis niloticus
Pathogens
Ponds
Sinuolinea niloticus
Tilapia
Zoology
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Summary:Myxozoans can induce losses in production of marine and freshwater fish. Recently, a new parasitic myxozoan species, Sinuolinea niloticus , was identified and its importance highlighted. This study aimed to investigate Sinuolinea niloticus and its macroscopic and microscopic alterations in Nile tilapia ( Oreochromis niloticus ) specimens from fish farms in Botucatu, São Paulo, Brazil, as well as its molecular detection. Thirty tilapias from three different fish farms were collected and submitted to necropsy examination, where organs were sampled for histopathological and molecular analysis. The main necroscopic findings at all three fish farms were hemorrhaging, fin erosion, hepatomegaly, and splenomegaly. Microscopically, the main findings were degeneration of hepatocytes and hepatitis, epithelial and goblet cell hyperplasia in the gills, nephritis, gastritis, and presence of myxozoan-like structures in different organs. S. niloticus , detected by qPCR, showed a 90% prevalence among surveyed fish at farm 1 and 100% at farms 2 and 3. The high prevalence found in this study shows the importance of this myxozoan as a potential pathogenic agent of farmed O. niloticus that negatively affects fish health and, consequently, production.
ISSN:0967-6120
1573-143X
DOI:10.1007/s10499-020-00565-6