Navegando por Assunto "Histopatologia"

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Acesso aberto (Open Access)
Aspectos anatomopatológicos em cães naturalmente infectados por Hepatozoon canis
(Universidade Federal do Pará, 2017-02) LIMA, Pâmela Aparecida de; BARÇANTE, Joziana Muniz de Paiva; BOELONI, Jankerle Neves; BEZERRA JÚNIOR, Pedro Soares; WOUTERS, Flademir; WOUTERS, Angelica Terezinha Barth; VARASCHIN, Mary Suzan; SEIXAS, Josilene Nascimento
Canine hepatozoonosis is mainly caused by protozoa Hepatozoon canis and H. americanum that are transmitted by ingestion of infected ticks. Clinical signs may be unspecific or difficult to identify, because usually hepatozoonosis occurs associated with other disease. In Brazil, the parasite and the disease, have been identified in several states, however little is known about the clinical and anatomopathological lesions resulting from the infection. This paper reports five cases of natural infection by Hepatozoon canis in dogs from Minas Gerais State and describes for the first time in Brazil the necropsy and histopathological findings related to infection. Meronts of Hepatozoon sp., submitted to morphometric evaluation, were observed in histological sections of liver, spleen, bone marrow and kidney.
Acesso aberto (Open Access)
Equinococose neotropicial: um estudo anatomopatológico para auxílio em uma sistematização diagnóstica correlacionada a morfologia
(Universidade Federal do Pará, 2012) ABREU JUNIOR, José Maria de Castro; SOARES, Manoel do Carmo Pereira; http://lattes.cnpq.br/1483308844442427; BATISTA, Evander de Jesus Oliveira; http://lattes.cnpq.br/2206444845201080
Equinococcosis is a disease caused by cestodes of the Echinococcus genus, that can be found at the small intestin of animals like bush-dog and domestic dog. Men behave as an accidental host by the ingestion of eggs of the parasite. The larval forms mainly develop at the liver, and sometimes at the lung, causing a cronic diesease that can be easily mistaken by neoplasias. At the State of Pará, North Brazil, there is a great number of cases of this rare diesease, related to Echinococcus vogeli in the Amazon.This study describes six new cases, five in the the liver, and one at the lung, making description a about the kind of inflammatory cells. Fibrosis, giant-cells, calcification and the laminated layer with the typical cerebroid pattern. Rostellar hooklets did not were found. The laminated layer, is not enough to describe the species of Echinococcus, but allows to consider that the worm´s gender is Echinococcus. Even though the number of cases is too small for a statistical analysis, were observed cells that can justify why the disease has a cronic evolution. More works like this, adding more cases are important, because equinococcosis is a neglected diesese.
Acesso aberto (Open Access)
Histopathologic aspects in Plagioscion squamosissimus (HECKEL, 1940) induced by Neoechinorhynchus veropesoi, metacestodes and anisakidae juveniles
(Universidade Federal do Pará, 2014-06) MELO, Francisco Tiago de Vasconcelos; RODRIGUES, Rogério Antonio Ribeiro; GEISE, Elane Guerreiro; GARDNER, Scott Lyell; SANTOS, Jeannie Nascimento dos
Plagioscion squamosissimus (Heckel 1840), a fish endemic to the Amazon Basin and commonly known as the “silver croaker”, plays an important role in the ecology and economy of Pará State, Brazil. Knowledge of host-parasite relationships is important to understanding the role of parasites in the control of natural host populations. This work describes histopathological aspects caused by several common intestinal parasites found during a helminthological survey of fish in northern Brazil. We observed a high prevalence of helminth infection, especially by J3 nematode juveniles of the family Anisakidae and metacestodes of the family Protocephalidae (both with 100% prevalence). An external capsule surrounded each juvenile with numerous juveniles inside sac-like structures formed of connective tissue. Inflammation was observed to be caused by infection of metacestodes, reaching the intestinal muscularis mucosa. Neoechinorhynchus veropesoi (38% prevalence) was found in the small intestine of P. squamosissimus, invading the mucosa, submucosa, and internal muscularis of the intestine causing intense inflammation. Histopathology of host-parasite relationships in fish has been rare, and the pathology of parasites in P. squamosissimus is described herein.