Histopatologia de fígado, rim e baço de piaractus mesopotamicus, prochilodus lineatus e pseudoplatystoma fasciatum parasitados por myxosporídios, capturados no Rio Aquidauana, Mato Grosso do Sul, Brasil

Campos, Cristiane Meldau de; Moraes, Julieta Rodini Engrácia de; Moraes, Flávio Ruas de

doi:10.1590/s1984-29612008000400006

Cited by 22 publications

(7 citation statements)

References 27 publications

(20 reference statements)

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“…The fish liver is especially liable to chemical products thanks to the slow blood flow in relation to the cardiac output. Campos, Moraes, and Moraes (2008) observed steatosis in fish maintained in contaminated environments, although Santos, Ranzani-Paiva, Felizardo, and Rodrigues (2004), and Camargo & Martinez (2007) found no lesions whatsoever, even in polluted environments. Therefore, it is very difficult to establish relations among this condition and toxic substances in water.…”

Section: Discussionmentioning

confidence: 92%

Histopathological analysis of liver of the catfish <i>Pimelodus maculatus</i> in a tropical eutrophic reservoir from Southeastern Brazil

Araújo

Gomes

Nascimento

et al. 2019

Acta Sci. Biol. Sci.

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We described liver tissues of the long-whiskered catfish Pimelodus maculatus using histological techniques through structures stained with hematoxylin and eosin. A total of 21 adult individuals were collected using gill nets during the winter of 2012, in a eutrophic reservoir in Southeastern Brazil. The main aim was to characterize the tissues and eventual changes, since this organ has a notable sensitivity to changes in altered aquatic systems. The liver contains the exocrine pancreas (hepatopancreas) that have pancreatic cells arranged around a branch of the portal vein. The hepatocytes are diffuse and arranged in cords. Normal liver of P. maculatus have a continuous compact field of weakly eosinophilic, rounded hepatocytes with scattered islands of connective tissue that enclose the bile ducts and blood vessels. The organization of exocrine pancreatic tissues is similar to the acinar morphology of many teleosts. Histopathological alterations in liver were evaluated semi-quantitatively and based on the severity of the lesions. The alterations in each organ were classified in progressive stages of damage to the tissue. Six types of liver alterations were found: 1) cytoplasmic vacuolization; 2) congestion; 3) inflammatory infiltrated; 4) infiltration of adipocytes; 5) steatosis; 6) granuloma. Incidence of melanomacrophage centers were observed in the liver. However, we cannot directly associate such changes with the eutrophic conditions of the reservoir, because we have no available reference area to compare. These findings are a baseline contribution, which enables comparisons with similar fish species in other tropical aquatic systems in further studies.

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Section: Discussionmentioning

confidence: 92%

Histopathological analysis of liver of the catfish <i>Pimelodus maculatus</i> in a tropical eutrophic reservoir from Southeastern Brazil

Araújo

Gomes

Nascimento

et al. 2019

Acta Sci. Biol. Sci.

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“… Pseudoplatystoma fasciatum ( Actinopterygii : Pimelodidae ); freshwater; intestine; adult; Amazon and Paraná River basins; Brazil, Paraguay, Peru ( Rego 1989 , 1990 ; de Chambrier and Vaucher 1999 ; Zehnder and Mariaux 1999 ; Zehnder and de Chambrier 2000 ; Olson et al 2001 ; Rego 2002 ; Ceccarrelli et al 2006 ; Campos et al 2008 , 2009a , b ; de Chambrier et al 2015a ).…”

Section: Parasite-host Listmentioning

confidence: 99%

Annotated checklist of fish cestodes from South America

Alves¹,

Chambrier²,

Scholz³

et al. 2017

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An exhaustive literature search supplemented by a critical examination of records made it possible to present an annotated checklist of tapeworms (Cestoda) that, as adults or larvae (metacestodes), parasitize freshwater, brackish water and marine fishes, i.e. cartilaginous and bony fishes, in South America. The current knowledge of their species diversity, host associations and geographical distribution is reviewed. Taxonomic problems are discussed based on a critical evaluation of the literature and information on DNA sequences of individual taxa is provided to facilitate future taxonomic and phylogenetic studies. As expected, the current knowledge is quite uneven regarding the number of taxa and host-associations reported from the principal river basins and marine ecoregions. These differences may not only reflect the actual cestode richness but may also be due to the research effort that has been devoted to unravelling the diversity of these endoparasitic helminths in individual countries. A total of 297 valid species, 61 taxa identified to the generic level, in addition to unidentified cestodes, were recorded from 401 species of fish hosts. Among the recognized cestode orders, 13 have been recorded in South America, with the Onchoproteocephalidea displaying the highest species richness, representing c. 50% of all species diversity. The majority of records include teleost fish hosts (79%) that harbour larval and adult stages of cestodes, whereas stingrays (Myliobatiformes) exhibit the highest proportion of records (39%) among the elasmobranch hosts. Fish cestodes are ubiquitous in South America, being mostly recorded from the Warm Temperate Southeastern Pacific (WTSP; 31%) for marine hosts and the Amazon River basin (45%) for freshwater ones. The following problems were detected during the compilation of literary data: (i) unreliability of many records; (ii) poor taxonomic resolution, i.e. identification made only to the genus or even family level; (iii) doubtful host identification; Alves et al. / ZooKeys 650: 1-205 (2017) 2 and (iv) the absence of voucher specimens that would enable us to verify identification. It is thus strongly recommended to always deposit representative specimens in any type of studies, including faunal surveys and ecological studies. An analysis of the proportion of three basic types of studies, i.e. surveys, taxonomic and ecological papers, has shown a considerable increase of ecological studies over the last decade.

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“…Le nombre, la taille et le contenu en mélanine des centres mélanomacrophages peuvent varier en fonction du sexe, et ont tendance à augmenter avec l'âge ou lorsque les conditions de vie deviennent défavorables. Les mélanomacrophages ont plusieurs fonctions chez les Poissons, tels que le traitement de l'antigène dans la réponse immunitaire, la destruction, la détoxication ou le recyclage de matériaux endogènes et exogènes, des dépôts de métabolites de cellules mortes, y compris les globules rouges, ainsi que la réaction à différents antigènes (Campos et al, 2008;Manrique et al, 2014).…”

Section: Brachydeuterus Auritus Les Hépatopancréas Des Mâles Chez Braunclassified

Anatomie Et Histologie De L’hepatopancreas Chez Le Male Du Poisson Brachydeuterus Auritus (Haemulidae, Valenciennes, 1831) En Cote D’ivoire

Kouassi

d’Almeida

Miessan

et al. 2017

ESJ

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Brachydeuterus auritus is a fish species with a high level of exploitation potential in Côte d'ivoire. The following study is based upon a maturity ladder and the discrimination of the hepatopancreas. The methodological approach consisted of a macroscopic description of the hepatopancreas according to the five stages of sexual maturity. The microscopic study consisted of fixing the hepatopancreas, dehydrating, impregnating, including it, making cuts that are colored for observation. At the macroscopic level, the hepatopancreas is made of two unequal lobes. The organ has a colouring as well as a vascularization varying in terms of the species development stages. At the microscopic level among the males, the hepatopancreas is a mixed organ made of the liver and the pancreas. The hepatopancreatic parenchyma is an homogeneous tissue made of hematocytes which are polygonal cells. In addition, we can find hematopoietic tissues in the parenchyma and melanomacrophages centers located near the blood vessels and the biliary tracts. The melanomacrophages centers are formed with cells accumulating pigment cells. Inside the organ, the pancreas is discriminated centripally and constituted of exocrine cells and Langerhans islets. The physiology of the two entities (liver and European Scientific Journal August 2017 edition Vol.13, No.24 ISSN: 1857 -7881 (Print) e -ISSN 1857 290 pancreas) will establish the organ's physiology. Hepatopancreas is involved in reproduction, digestion and defence. It exists as an organ that controls many functions and plays an important part in the physiology of fish in anabolism and catabolism.Keywords: Brachydeuterus auritus; male ; hepatopancreas ; anatomy ; histology ResumeBrachydeuterus auritus est une espèce de poisson qui présente un fort potentiel d'exploitation en Côte d'Ivoire. La présente étude porte sur l'échelle de maturité et la différenciation de l'hépatopancréas. La démarche méthodologique a consisté à une description macroscopique de l'hépatopancréas en fonction des cinq stades de maturité sexuelle. L'étude microscopique a consisté à fixer les hépatopancréas, à les déshydrater, à les imprégner, à les inclure, à réaliser les coupes qui seront colorées en vue d'une observation. Au plan macroscopique, l'hépatopancréas est constitué de deux lobes inégaux. L'organe présente une coloration, des granulations et une vascularisation qui varient en fonction des stades de développement de l'espèce. Au plan microscopique, chez le mâle, l'hépatopancréas est un organe mixte constitué du foie et du pancréas. Le parenchyme hépatique est un tissu homogène, formé d'hépatocytes qui sont des cellules polygonales. En outre, on distingue dans le parenchyme des tissus hématopoïétiques et des centres mélanomacrophages, répartis près des vaisseaux sanguins et des voies biliaires. Les centres mélanomacrophages sont constitués de cellules accumulant des pigments. Au sein de l'organe, le pancréas se différencie de façon centripète. Il est constitué de cellules exocrines et des îlots de Langerhans. La ph...

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Histopatologia de fígado, rim e baço de piaractus mesopotamicus, prochilodus lineatus e pseudoplatystoma fasciatum parasitados por myxosporídios, capturados no Rio Aquidauana, Mato Grosso do Sul, Brasil

Cited by 22 publications

References 27 publications

Histopathological analysis of liver of the catfish <i>Pimelodus maculatus</i> in a tropical eutrophic reservoir from Southeastern Brazil

Histopathological analysis of liver of the catfish <i>Pimelodus maculatus</i> in a tropical eutrophic reservoir from Southeastern Brazil

Annotated checklist of fish cestodes from South America

Anatomie Et Histologie De L’hepatopancreas Chez Le Male Du Poisson Brachydeuterus Auritus (Haemulidae, Valenciennes, 1831) En Cote D’ivoire

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