Parâmetros hematológicos e alterações histopatológicas em bijupirá (Rachycentron canadum Linnaeus, 1766) com amyloodiniose

Guerra-Santos, Bartira; Albinati, Ricardo Castelo Branco; Moreira, Eduardo Luiz Trindade; Lima, Fernanda W. M.; Azevedo, Tatiana Maslowa Pegado de; Costa, Dayana Bastos; Medeiros, Silene Duarte Costa de; Lira, Alessandra Danile de

doi:10.1590/s0100-736x2012001100019

Cited by 15 publications

(21 citation statements)

References 18 publications

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“…The trophont stage is pear or roundedshaped, has golden to brownish color, presents chloroplasts and is capable of feeding when adhered on the fish surface or gills by its rhizocysts. The tomont is the reproductive form (it encysts on the substrate) and the dinospore corresponds to the infective free-swimming stage with a longitudinal and transverse flagellum (NOGA, 1987;GUERRA-SANTOS et al, 2012;WOO & ARDELLI, 2014).…”

Section: Amyloodinium Ocellatum Brown Et Hovasse 1946mentioning

confidence: 99%

“…Diagnosis of A. ocellatum is made from scrapings of body surface and gills between a glass slide and a coverslip to be observed in stereomicroscope or light microscope (MONTGOMERY-BROCK et al, 2001;ABREU et al, 2005;GUERRA-SANTOS et al, 2012). In addition, microscopic examination of histological sections of parasitized tissue also reveals the presence of the parasite (GUERRA-SANTOS et al, 2012), while the serological exam with the presence of specific antibodies is yet little explored (CECCHINI et al, 2001).…”

Section: Diagnosismentioning

confidence: 99%

“…In addition, microscopic examination of histological sections of parasitized tissue also reveals the presence of the parasite (GUERRA-SANTOS et al, 2012), while the serological exam with the presence of specific antibodies is yet little explored (CECCHINI et al, 2001). Its fixation is made directly in the slides with 5% formalin solution or in a flask with 10% buffered formaline solution for histopathology.…”

Section: Diagnosismentioning

confidence: 99%

“…Among the acute pathological changes an increase in mucus production and gill congestion is common (GUERRA-SANTOS et al, 2012), frequently leading to vacuolar degeneration, epithelial rupture, hyperplasia and fusion of the secondary lamellae and necrosis in severely affected fish (CRUZ-LACIERDA et al, 2004;SARAIVA et al, 2011).…”

Section: Pathogenesis and Clinical Signsmentioning

confidence: 99%

“…Anorexia, erratic swimming, lethargy, "flashing" onto the substrates, skin depigmentation, emaciation and branchial hyperventilation are the main clinical signs (ABREU et al, 2005;FRANCIS-FLOYD & FLOYD, 2011;GUERRA-SANTOS et al, 2012).…”

Section: Pathogenesis and Clinical Signsmentioning

confidence: 99%

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Protozoan infections in farmed fish from Brazil: diagnosis and pathogenesis

Martins

Cardoso

Marchiori

et al. 2015

Rev. Bras. Parasitol. Vet.

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The Phylum Protozoa brings together several organisms evolutionarily different that may act as ecto or endoparasites of fishes over the world being responsible for diseases, which, in turn, may lead to economical and social impacts in different countries. Apart from the recent advances for the diagnosis of fish diseases in Brazil, little is known on the protozoan parasites and their relationship with environment and host. This revision presents the most important protozoan parasites found in farmed fish from Brazil, not only with emphasis on its diagnosis, biology, transmission and host-parasite relationship, but also on some information that may be useful to researchers in determining the correct diagnosis in fish farms.Keywords: Fish parasites, disease, ciliate, dinoflagellate, pathogenicity. ResumoO filo Protozoa reúne diversos organismos evolutivamente distintos que podem atuar como ecto ou endoparasitos de peixes em todo o mundo, sendo responsáveis por doenças as quais, por sua vez, podem ocasionar impactos econômico e social nos diferentes países. Apesar dos recentes avanços no campo de diagnóstico de doenças em peixes no Brasil, ainda pouco se conhece sobre a fauna de protozoários parasitos de peixes e suas relações com o ambiente e hospedeiro. Esta revisão apresenta os mais importantes protozoários parasitos encontrados em peixes cultivados no Brasil, não apenas com ênfase no seu diagnóstico, biologia, transmissão e relação hospedeiro-parasito, mas também algumas informações que podem ser úteis para pesquisadores para o correto diagnóstico em pisciculturas.Palavras-chave: Parasitos de peixes, enfermidade, ciliado, dinoflagelado, patogenicidade.

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Section: Amyloodinium Ocellatum Brown Et Hovasse 1946mentioning

confidence: 99%

Section: Diagnosismentioning

confidence: 99%

Section: Diagnosismentioning

confidence: 99%

Section: Pathogenesis and Clinical Signsmentioning

confidence: 99%

Section: Pathogenesis and Clinical Signsmentioning

confidence: 99%

See 3 more Smart Citations

Protozoan infections in farmed fish from Brazil: diagnosis and pathogenesis

Martins

Cardoso

Marchiori

et al. 2015

Rev. Bras. Parasitol. Vet.

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Amyloodiniosis

Beraldo

Massimo

2022

Aquaculture Pathophysiology

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Antiparasitic activity of the essential oil of Lippia alba on ectoparasites of Colossoma macropomum (tambaqui) and its physiological and histopathological effects

Soares

Neves²,

Oliveira

et al. 2016

Aquaculture

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This study investigated the in vivo and in vitro antiparasitic effects of the essential oil of Lippia alba and the bloodrelated and histopathological alterations that it causes in Colossoma macropomum. In the in vitro trial, the anthelminthic effects of 160, 320, 640, 1280 and 2560 mg/L of the essential oil were tested against monogenoideans (Anacanthorus spathulatus, Notozothecium janauachensis and Mymarothecium boegeri) of the gills of this fish, which are its natural parasites. The concentrations of 1280 mg/L and 2560 mg/L showed 100% efficacy after 20 min of exposure to the essential oil, while at lower concentrations this efficacy against the gill monogenoideans only occurred after 2-3 h of in vitro exposure. However, in the controls, mortality of all of these monogenoideans only occurred after 9 h. A total of 240 fry were distributed into four treatments (20 fish per repetition) and three repetitions were used in the in vivo trial for baths with 100 and 150 mg/L of the essential oil of L. alba, for 30 min. The efficacy in this trial against Ichthyophthirius multifiliis in fish exposed to 100 and 150 mg/L of the essential oil was 40.7% and 50.3%, respectively. However, for monogenoideans, there was efficacy of 14.0% only in the fish exposed to 100 mg/L of the essential oil used. Moreover, the fish exposed to these concentrations of the essential oil presented increased plasma glucose levels, thus denoting signs of stress. Severe lesions such as hyperplasia, fusion of the lamellar epithelium, capillary dilatation, epithelial detachment, lamellar aneurysm, epithelial rupture with hemorrhage, congestion, edema, necrosis, mucous cell proliferation, chloride cells and lamellar hypertrophy were observed in the gills of the fish exposed to 100 and 150 mg/L of the essential oil of L. alba. Alterations to total protein levels, hemoglobin, hematocrit, red blood cell number, thrombocytes number, white blood cell number, lymphocytes, eosinophils and blood neutrophil number was also observed in these fish. The essential oil of L. alba showed great potential for antiparasitic treatment, given that it had high in vitro efficacy against monogenoideans and in vivo efficacy against the protozoon I. multifiliis. Because of the low concentrations of the essential oil (100 and 150 mg/L) that were tolerated by the fish and thus could be used in the therapeutic baths, the efficacy against monogenoideans was low. This indicates that there is a need for additional strategies for using this essential oil in antiparasitic treatments, since the concentrations that eliminate these ectoparasites are toxic for the hosts. Lastly, this was the first study on the antiparasitic activity of L. alba. Statement of Relevance The manuscript entitled "Antiparasitic activity of the essential oil of Lippia alba on ectoparasites of Colossoma macropomum (tambaqui) and its physiological and histopathological effects", represents original article on use of the essential oil of Lippia alba on ectoparasites of tambaqui, an important finfish of Amazon regio...

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Parâmetros hematológicos e alterações histopatológicas em bijupirá (Rachycentron canadum Linnaeus, 1766) com amyloodiniose

Cited by 15 publications

References 18 publications

Protozoan infections in farmed fish from Brazil: diagnosis and pathogenesis

Protozoan infections in farmed fish from Brazil: diagnosis and pathogenesis

Amyloodiniosis

Antiparasitic activity of the essential oil of Lippia alba on ectoparasites of Colossoma macropomum (tambaqui) and its physiological and histopathological effects

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