ABSTRACT
Studies on fish parasites in Pampulha dam, Belo Horizonte, Minas Gerais, Brazil, found specimens of Poecilia reticulata Peters, 1859 harboring natural infection by larval stages of tapeworms. A total of 250 specimens of P. reticulata were collected and analyzed between February and August 2010, of which 23 were found infected (prevalence 9.2 percent) with one metacestode each (mean intensity 1, mean abundance 0.09). The analyses of the parasites, particularly the morphology of rostellar hooks, made it possible to identify Glossocercus auritus (Rudolphi, 1818). This is the first report of G. auritus metacestode in South America and P. reticulata is a newly known host for this parasite.
Em estudo da helmintofauna de peixes oriundos da represa da Pampulha, Belo Horizonte, Minas Gerais, Brasil, exemplares de Poecilia reticulata Peters, 1859 foram encontrados naturalmente infectados por larvas de cestóides. De 250 espécimes de P. reticulata coletados e analisados entre fevereiro e agosto de 2010, 23 (prevalência de infecção 9,2 por cento) apresentavam-se infectados por um metacestóides cada (intensidade média 1, abundância média 0,09). A análise dos parasitos, em especial a morfologia dos acúleos rostelares, permitiram a identificação de Glossocercus auritus (Rudolphi, 1818). Este é o primeiro registro de metacestóide de G. auritus para a América do Sul, sendo P. reticulata um novo hospedeiro conhecido para o parasito.
Subject(s)
Animals , Cestoda/physiology , Poecilia/parasitology , Brazil , LarvaABSTRACT
O objetivo desta pesquisa foi registrar a presença de cestoides Trypanorhyncha, suas prevalências e intensidades de infecção, na musculatura e serosa abdominal parietal de 50 exemplares de Macrodon ancylodon, capturados no litoral Norte do Brasil e beneficiados em Belém, Estado do Pará, durante o período de junho de 2004 a janeiro de 2005. A musculatura e serosa abdominal dos peixes foram examinadas em mesa de inspeção candling table após o filetamento das amostras. Oito peixes encontravam-se parasitados por plerocercoides da espécie Poecilancistrium caryophyllum, com prevalência de 16 por cento e intensidade média de infecção de um plerocerco por peixe, tendo como único sítio de infecção a musculatura. A espécie Poecilancistrium caryophyllum é, pela primeira vez, registrada para M. ancylodon.
The aim of this research was to report the presence of Trypanorhyncha cestodes, their prevalence and mean intensity in the muscles musculature and abdominal serose in commercial fish processed in Belém, Pará State. Fifty specimens of M. ancylodon were captured in the North Coast of Brazil. The musculature and adjacent abdominal serose of fish were analized in a "candling table" after filleted. Eight specimens were parasitized by plerocercoids of Poecilancistrium caryophyllum, with a prevalence of 16 percent and mean intensity of infection of one plerocercus per fish, varying from the unique site of infection was the musculature. The species P. caryophyllum is reported by the first time on M. ancylodon.
Subject(s)
Animals , Cestoda/physiology , Perciformes/parasitology , BrazilABSTRACT
The nervous system of the Cestode Bothriocephalus achelognathi, which belongs to the order Pseudophyllidea was studied, as one of the most economic fishes in Iraq [Barbus esocinus] [Heckel, 1843] for the period Spring - Summer at year 1994 from lake Sad Sadam in Mosul, north of Iraq. The nervous sytem was studied using Acetylthiocholine Iodide for the detection of acetylcholine esterases [Achl]. The nervous system consists of two cerebral ganglia which are connected by a cerebal transverse commissure, located at the sides of the bothria. From these two ganglia two nerves arise anteriorly, and eight nerve trunks posteriorly. These trunks are connected together by eleven transverse commissures. Along the media venteral trunk, there are eleven post - lateral ganglia in each segment. A comparsion was made between the nervous system of this specie of cestode and those of other related species which belong to the same order. Positive enzymatic reactions were observed in non- nervous organs such as gonad anlagen and other genital organs
Subject(s)
Cestoda/physiology , Nervous System/anatomy & histologyABSTRACT
Ultrastructural studies on the body surface of the adult tapeworm Oochoristica sp. revealed that all the strobilar surface including the scolex and the adhesive surfaces of the suckers are covered with long filamentous microtriches. Using scanning and transmission electron microscopes, the basic morphology of the microtriches was studied and found to be similar to those described in other cestodes, but differs in having a relatively long basal regions. The flame cell was also described
Subject(s)
Cestoda/physiology , Microscopy, Electron/instrumentationABSTRACT
Cestóides hiperparasitos säo descritos de espécies de proteocefalídeos, que ocorrem em peixes pimelodídeos de diferentes regiöes do Brasil. Referimos ainda, a ocorrência de nematóide hiperparasito em espécimes de Choanoscolex abscissus, do peixe pimelodídeo, Pseudoplatystoma carruscans. Säo citadas as referências anteriores de cestóides e nematóides hiperparasitos, e discutida a possível identificaçäo dos mesmos
Subject(s)
Animals , Cestoda/physiology , Fishes/parasitology , Nematoda/physiology , Host-Parasite InteractionsABSTRACT
A total of 622 and 110 commensal and forest rodents and shrews was examined in the urban and rural areas of Chanthaburi Province, Thailand. A higher density of commensal animals was found in urban than rural areas. Five enteropathogenic bacteria, and four helminth species of significant medical importance were collected. The Oriental rat-flea, X. cheopis was found prevalent among these animals. The findings of adult A. cantonensis worm in S. murinus the first reported case of the parasite developed into adult in an abnormal host.