Resultado da pesquisa (10)

Termo utilizado na pesquisa Sarcocystis

#1 - Molecular detection of Apicomplexa protozoa in tissues from Alouatta guariba clamitans

Abstract in English:

The brown howler monkey (Alouatta guariba clamitans) is a primate species widely distributed in South America. Infections by protozoa are common in primates. However, studies on protozoa in primates in Brazil are scarce, so the goal of this study was to investigate DNA from the apicomplexan protozoa Neospora caninum, Sarcocystis spp. and Toxoplasma gondii in tissues of A. guariba clamitans. DNA extraction was performed on tissue samples from the heart, brain, liver, spleen, lung and intestine of six A. guariba clamitans from Santa Maria, Central Region of Rio Grande do Sul, Brazil. Conventional PCR was performed using 18S rRNA gene general primers for Apicomplexa and also specific primers to amplify Neospora spp. and Toxoplasma gondii DNA. All animals were positive in the 18S PCR and the genetic sequencing confirmed the presence of Sarcocystis spp. DNA in the tissues of four animals belonging to at least two species (S. neurona and S. gigantea) and T. gondii DNA in the other two animals. One positive sample for T. gondii was genotypically characterized as atypical by the restriction fragment length polymorphism technique. N. caninum DNA was not detected in the tested samples. The presence of Apicomplexa protozoan DNA in the tissues of the six animals tested in this study highlights the importance of howler monkeys as maintainers of these pathogens in nature.

Abstract in Portuguese:

O bugio ruivo (Alouatta guariba clamitans) é uma espécie de primata amplamente distribuída na América do Sul. As infecções por protozoários são comuns em primatas. Entretanto, estudos sobre protozoários em primatas no Brasil são escassos, portanto o objetivo deste estudo foi pesquisar DNA dos protozoários Apicomplexa Neospora caninum, Sarcocystis spp. e Toxoplasma gondii em tecidos de A. guariba clamitans. A extração de DNA foi realizada em amostras de tecido do coração, cérebro, fígado, baço, pulmão e intestino de seis A. guariba clamitans oriundos de Santa Maria, Região Central do Rio Grande do Sul, Brasil. Foi realizada PCR convencional utilizando primers geral do gene 18S rRNA para Apicomplexa e também primers específicos para amplificação de DNA de Neospora spp.e Toxoplasma gondii. Todos os animais foram positivos no PCR geral para Apicomplexa e no sequenciamento genético confirmou-se a presença de DNA de Sarcocystis nos tecidos de quatro animais pertencentes a pelo menos duas espécies (S. neurona e S. gigantea), e DNA de T. gondii foi detectado nos outros dois animais. Uma amostra positiva para T. gondii foi caracterizada genotipicamente como atípico pela técnica de polimorfismo do comprimento do fragmento de restrição. Não foi detectado DNA de N. caninum nas amostras testadas. A presença de DNA de protozoários apicomplexa nos tecidos dos seis animais testados neste estudo destaca a importância dos bugios ruivos como mantenedores desses patógenos na natureza.


#2 - Histopathology and microscopic morphology of protozoan and metazoan parasites of free ranging armadillos in Brazil

Abstract in English:

This study assessed microscopic morphology of protozoan and metazoan parasites, as well as parasite-associated histopathologic changes in five Brazilian free-ranging armadillos. Three armadillos had intra sarcolemmal cysts of Sarcocystis sp. in skeletal muscles without microscopic changes. One Dasypus novemcinctus was found parasitized with a nematode morphologically compatible with an oxyurid in the small intestine. One Dasypus sp. had neutrophilic enteritis associated with adult and larval stages of Strongyloides sp. and one D. novemcinctus had multiple embryonated eggs free in the lumen of the small intestine with mild neutrophilic enteritis. These findings represent a contribution for expanding our knowledge on parasitic diseases of armadillos.

Abstract in Portuguese:

Este estudo avaliou a morfologia microscópica de parasitos protozoários e metazoários, bem como lesões associadas ao parasitismo em cinco tatus de vida livre no Brasil. Três tatus tinham cistos de Sarcocystis sp. Intra-sarcolemal em músculos esqueléticos sem alterações microscópicas. Um Dasypus novemcinctus estava parasitado com um nematodo morfologicamente compatível com oxiurideo no intestino delgado. Um Dasypus sp. apresentou enterite neutrofílica associada com estágios larvais de Strongyloides sp. e um D. novemcinctus apresentou múltiplos ovos embrionados livres no lúmen do intestino delgado, associado a enterite neutrofílica discreta. Estes achados representam uma contribuição para a expansão do conhecimento sobre doenças parasitárias de tatus.


#3 - Performance of the Dot-blot test method for detecting antibodies to Sarcocystis spp. in cattle

Abstract in English:

Serological techniques can detect antibodies against Sarcocystis spp., Neospora caninum and Toxoplasma gondii antigens in single or mixed infections. Immunofluorescent antibody tests (IFAT) is considered the gold standard technique for Sarcocystosis diagnostic in cattle serum and a positive IFAT result reflects Sarcocystis spp. infection. Therefore, the aims of the present study were to compare IFAT and Dot-blot for sarcocystosis diagnostic in experimentally infected mice and to investigate serological cross-reactions with N. caninum and T. gondii in these methods. Mice (Mus musculus) were inoculated intraperitoneally with bradizoites of Sarcocystis spp. or tachyzoites of N. caninum or T. gondii. Serum samples were obtained and analyzed by IFAT and Dot-blot for the three protozoa. Serum from N. caninum and T. gondii experimentally infected mice were tested by IFAT and reacted only to N. caninum or T. gondii antigens, respectively. Specific antibodies against Sarcocystis spp. were present in all animals experimentally infected with this protozoan, with IFAT titers from 10 to 800. Serum samples from mice experimentally infected with Sarcocystis spp., N. caninum and T. gondii and tested by Dot-blot demonstrated no cross reaction between protozoa. A Dot-blot using Sarcocystis spp. antigen appears to be a good alternative to IFAT in the serological diagnosis of Sarcocystosis.

Abstract in Portuguese:

As técnicas sorológicas podem detectar anticorpos contra os antígenos de Sarcocystis spp., Neospora caninum e Toxoplasma gondii em infecções únicas ou mistas. O teste de anticorpos imunofluorescentes (IFAT) é considerado a técnica padrão-ouro para o diagnóstico de sarcocistose no soro de bovinos e um resultado positivo de IFAT reflete Sarcocystis spp. infecção. Portanto, os objetivos do presente estudo foram comparar IFAT e Dot-blot para diagnóstico de sarcocistose em camundongos infectados experimentalmente e investigar reações cruzadas sorológicas com N. caninum e T. gondii nesses métodos. Os camundongos (Mus musculus) foram inoculados intraperitonealmente com bradizoítos de Sarcocystis spp. ou taquizoítos de N. caninum ou T. gondii. As amostras de soro foram obtidas e analisadas por IFAT e Dot-blot para os três protozoários. O soro de N. caninum e T. gondii infectados experimentalmente foram testados por IFAT e reagiram apenas aos antígenos de N. caninum ou T. gondii, respectivamente. Anticorpos específicos contra Sarcocystis spp. estavam presentes em todos os animais experimentalmente infectados com este protozoário, com títulos de IFAT de 10 a 800. Amostras de soro de camundongos infectados experimentalmente com Sarcocystis spp., N. caninum e T. gondii e testadas por Dot-blot não demonstraram reação cruzada entre protozoários. Um Dot-blot usando Sarcocystis spp. O antígeno parece ser uma boa alternativa ao IFAT no diagnóstico sorológico da sarcocistose.


#4 - Risk factors associated to the prevalence of anti-Sarcocystis neurona, Neospora spp. and Toxoplasma gondii antibodies in horses from Roraima, Brazilian Amazon

Abstract in English:

Samples of 303 horses from 56 ranches of Rorainópolis municipality, state of Roraima, were evaluated by means of the Indirect Immunofluorescence Test (IFAT) to detect antibodies against Sarcocystis spp., Toxoplasma gondii and Neospora spp. A subset of positive sample (n=15) against Sarcocystis spp. was evaluated by Western Blotting (WB) with crude antigen of S. neurona. From the serological result, possible risk factors were evaluated against individual or farming variables. The prevalence of anti-Sarcocystis spp. antibodies was estimated to be 43.2% (37.6-49.0%), anti-Neospora sp. was 26.7% (21.9-32.2%), and anti-T. gondii was 18.5% (14.3-23.4%). Fourteen samples (14/15) evaluated by WB were positive for S. neurona antigens. From the ranches, 76.8% (43/56) presented at least one positive horse for Sarcocystis spp., 69.6% (39/56) for Neospora spp., and 55.4% (31/56) for T. gondii. Thirteen (14.3%) horses had antibodies against all agents, 50 (16.5%) had antibodies against Sarcocystis spp. and Neospora spp., 10 (3.3%) for Neospora spp. and T. gondii, and eight (2.6%) for Sarcocystis spp. and T. gondii. Associated variables (P≤0.05) for antibodies against Neospora spp. were not found in horses fed on rented pastures, not in horses without veterinary assistance and stables, and not in herds up to 5 horses; while they were associated for T. gondii by contact with cats, in the Lavradeiro breed with use of stables, in horses raise with cattle, and in herds up to 5 horses. There were no variables associated with the presence of antibodies against S. neurona. Antibodies against S. neurona, Neospora spp. and T. gondii were reported in horses from the state of Roraima, Northern Brazilian Amazon, highlighting to the elevate prevalence on ranches.

Abstract in Portuguese:

Amostras de sangue de 303 equinos provenientes de 56 propriedades do município de Rorainópolis, Roraima, foram avaliadas por Reação de Imunofluorescência Indireta (RIF) para pesquisa de anticorpos contra Sarcocystis neurona, Toxoplasma gondii e Neospora spp. Algumas amostras de soros positivos para Sarcocystis spp. foram avaliadas pelo Western Blotting (WB) utilizando antígenos crus de S. neurona. A partir dos resultados sorológicos, possíveis fatores de risco foram avaliados frente a variáveis individuais e de propriedade. A prevalência de anticorpos anti-Sarcocystis spp. foi estimada em 43,2% (37,6-49,0%), anti-Neospora sp. em 26,7% (21,9-32,2%) e anti-T. gondii de 18,5% (14,3-23,4%). Quatorze amostras (14/15) testadas por WB resultaram positivas para antígenos de S. neurona. Das propriedades, 76,8% (43/56) apresentaram pelo menos um equino positivo para Sarcocystis spp.; 69,6% (39/56) para Neospora spp. e 55,4% (31/56) para T. gondii. Dos equinos, 13 (4,3%) apresentarem anticorpos para os três agentes, 50 (16,5%) para Sarcocystis spp. e Neospora spp., 10 (3,3%) para Neospora spp. e T. gondii, e oito (2,6%) para Sarcocystis spp. e T. gondii. As variáveis associadas (P≤0,05) à presença de anticorpos foram: para Neospora spp. não pastejar em áreas alugadas, ausência de assistência veterinária na propriedade, sexo masculino, não estabular animais e plantel equino acima de 5 animais; enquanto para T. gondii foram o contato com felinos, animais da raça lavradeiro, animal estabulado, criação de bovinos na propriedade e plantel equino acima de 5 animais. Não houveram variáveis associadas a presença de anticorpos contra S. neurona. Relata-se no presente estudo a primeira detecção de anticorpos anti-S. neurona, Neospora spp. e T. gondii em equinos do estado de Roraima, localizado na Amazônia Setentrional Brasileira, ressaltando para a elevada frequência de fazendas com equinos soropositivos.


#5 - Molecular characterization of Sarcocystis spp. in samples of meat

Abstract in English:

The sarcocystosis is a worldwide spread disease and can affect birds, reptiles and many mammals, including man. The aim of this study was to detect the presence of Sarcocystis spp. and characterize the species found in 375 samples of meat products (filet mignon, ground beef and colonial salami). For this, we carried out the detection of the parasite by PCR for the amplification of the partial 18S rRNA gene and molecular characterization using the restriction fragment length polymorphism (RFLP) with restriction enzymes Bcl I, Alu I and Rsa I. The occurrence of Sarcocystis spp. was 17% (64/375) of all samples. Among the meat products evaluated, the filet mignon samples were positive in 5.6% (7/125), the ground beef in 12.8% (16/125) and the colonial salami in 32.8% (41/125). Of the positive samples, Sarcocystis hirsuta and Sarcocystis hominis were detected, with prevalence of 93.7% (60/64) and 6.3% (4/64), respectively. Considering the relevance of sarcocystosis in public health, the occurrence of S. hominis found may be a risk factor to human contamination. However, the presence of DNA of this parasite does not necessarily mean potential of infection to humans, because good practices in the manufacturing processes can reduce the viability of the cysts.

Abstract in Portuguese:

A sarcocistose é uma doença distribuída mundialmente, podendo acometer aves, répteis e diversos mamíferos, incluindo o homem. O objetivo desse trabalho foi detectar a presença de Sarcocystis spp. e caracterizar as espécies encontradas em 375 amostras de produtos cárneos (filé mignon bovino, carne moída bovina e salame colonial). Para isso, foi realizada a detecção do parasita através da técnica de PCR para amplificação parcial do gene 18S rRNA e sua caracterização molecular utilizando o polimorfismo no comprimento do fragmento de restrição (RFLP) com as enzimas de restrição Bcl I, Rsa I e Alu I. A ocorrência de Sarcocystis spp. foi de 17% (64/375) do total de amostras testadas pelo PCR. Entre os produtos cárneos avaliados, 5,6% (7/125) das amostras de filé mignon, 12,8% (16/125) de carne moída e 32,8% (41/125) de embutido colonial, foram positivas para presença do DNA do Sarcocystis spp. Entre estas amostras positivas, as espécies caracterizadas foram Sarcocystis hirsuta e Sarcocystis hominis com prevalências de 93,7% (60/64) e 6,3% (4/64), respectivamente. Considerando à relevância da sarcocistose na área da saúde pública, a ocorrência de S. hominis encontrado neste estudo, pode ser um fator de risco para a contaminação humana. Porém, a presença do DNA deste protozoário não significa necessariamente potencial de infecção aos humanos, pois cuidados nos processos de fabricação podem reduzir a viabilidade dos cistos.


#6 - Sarcocystis spp. in red deer (Cervus elaphus), fallow deer (Dama dama), and pudu (Pudu pudu) in southern Chile, 37(8):874-876

Abstract in English:

ABSTRACT.- Reyes E., Paredes E. & Navarrete-Talloni M.J. 2017. Sarcocystis spp. in red deer (Cervus elaphus), fallow deer (Dama dama), and pudu (Pudu pudu) in southern Chile. Pesquisa Veterinária Brasileira 37(8):874-876. Unidad de Anatomía Patológica, Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile. E-mail: majose.navarrete@uach.cl Worldwinde, cervids are considered an important source of infection and dissemination of a wide variety of pathogens, both for farm animals and humans. Among this diseases is sarcosporidiosis, which is a parasitic disease caused by Sarcocystis spp. (Protozoa: Apicomplexa). Most frequent clinical signs are hemolytic anemia, weakness, weight loss and decrease of growth and some species of Sarcocystis might cause abortions. The clinical disease in ruminants is fairly rare but the infection is very frequent. Infections are accumulative and the parasite does not generate immunity in any of the hosts. Ovine sarcosporidiosis is a serious issue in the some regions of Chile due to the macrocysts located in the muscle which means condemnation of the whole carcass. Sarcocystis spp. has been widely reported in red deer and other cervid species but in Chile the situation remains unknown. Nowadays there is little to no evidence of Sarcocystis in foreign deer in Chile and there is only one report of the parasite on pudu. The main goal of this study is to demonstrate the presence of Sarcocystis spp. in myocardium of red deer and fallow deer in Chile, and confirm the presence of Sarcocystis spp. in pudu. All cervid cases from 1994 to 2013 of the Institute of Animal Pathology of the Universidad Austral de Chile were reviewed. The animals selected were those in which a myocardium sample was taken. From the histopathological samples observed, it was found that 5 of the 9 red deer, 1 of the 4 fallow deer and in 11 of the 23 pudu there were Sarcocystis cysts in the myocardium. This study represents the first record for Chile of Sarcocystis spp. in myocardium of red deer and fallow deer. Stablishing the red deer, fallow deer and pudu as hosts of Sarcocystis aids to have a better understanding of the parasite epidemiology in Chile and the role of wild and captive cervids in the maintenance and spread of these parasites.

Abstract in Portuguese:

RESUMO.- Reyes E., Paredes E. & Navarrete-Talloni M.J. 2017. Sarcocystis spp. in red deer (Cervus elaphus), fallow deer (Dama dama), and pudu (Pudu pudu) in southern Chile. [Sarcocystis spp. em veado (Cervus elaphus), Gamo (Dama dama) e Pudu (Pudu pudu) no sul do Chile.] Pesquisa Veterinária Brasileira 37(8):874-876. Unidad de Anatomía Patológica, Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile. E-mail: majose.navarrete@uach.cl No mundo, os cervos são considerados uma fonte de infecção e propagação de uma grande variedade de patógenos para animais de criação e para os seres humanos. Entre estas doenças está a sarcosporidiosis, que é uma doença parasitária causada por Sarcocystis spp. (Protozoa: Apicomplexa). Os sinais clínicos mais comuns são anemia hemolítica, fraqueza, perda de peso e diminuição do crescimento e em algumas espécies de Sarcocystis podem causar abortos. A doença clínica em ruminantes é bastante rara, mas a infecção é muito comum. As infecções são cumulativos e o parasita não gera imunidade em nenhum dos seus hospedeiros. A Sarcosporidiosis ovina é um problema grave em algumas regiões do Chile devido a microcistos localizados no músculo provocando a reprovação total da carcaça. Sarcocystis spp. tem sido amplamente relatado em cervos vermelhos e outras espécies de cervídeos, mas no Chile a sua situação permanece desconhecida. Atualmente há pouca ou nenhuma evidência de Sarcocystis em cervos introduzidos no Chile e há apenas um relatório do parasita em pudú. O principal objetivo deste estudo é demonstrar a presença de Sarcocystis spp. no miocárdio no veado vermelho e cervo gamo no Chile e confirmar a presença de Sarcocystis spp. em pudus. Revisaram-se todos os casos de cervos desde 1994-2013 do Instituto de Patologia Animal da Universidad Austral de Chile. Os animais selecionados para o estudo foram aqueles em que se tomou amostra de miocárdio. Das amostras histopatológicas observadas, verificou-se que em cinco dos nove cervos vermelhos, em um dos quatro veados gamo e 11 dos 23 pudus tinham cistos de Sarcocystis no miocárdio. Este estudo representa o primeiro relatório para o Chile de Sarcocystis spp. no miocárdio de veados vermelhos e cervo gamo. Definir o veado vermelho, o cervo gamo e os pudú como anfitriões de Sarcocystis ajuda a uma melhor compreensão da epidemiologia deste parasita no Chile e o papel de cervos selvagens e em cativeiro para a manutenção e divulgação deste parasita.


#7 - Antibodies against Neospora caninum, Sarcocystis spp. and Toxoplasma gondii detected in buffaloes from Rio Grande do Sul, Brazil, 36(10):947-950

Abstract in English:

ABSTRACT.- Portella L.P., Cadore G.C., Lima M., Sangioni L.A., Fischer G. & Vogel F.S.F. 2016. Antibodies against Neospora caninum, Sarcocystis spp. and Toxoplasma gondii detected in buffaloes from Rio Grande do Sul, Brazil. Pesquisa Veterinária Brasileira 36(10):947-950. Laboratório de Doenças Parasitárias, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Camobi, Santa Maria, RS 97105-900, Brazil. E-mail: fefevogel@gmail.com The presence of antibodies against Neospora caninum, Sarcocystis spp. and Toxoplasma gondii was evaluated in buffaloes (Bubalus bubalis) from Rio Grande do Sul state (RS), southern Brazil. Serum samples (n=220) were analyzed for antibodies by indirect fluorescent antibody test (IFAT). Antibody presence was considered when the titers were equal or higher than 100 for these protozoa. A total of 60.5% (133/220) buffalo serum samples were positive for at least one of the protozoa evaluated in this study. Antibodies for N. caninum, Sarcocystis spp. and T. gondii were found in 36.4% (80/220), 25.5% (56/220) and 16.8% (37/220) of the buffaloes respectively, indicating a higher frequency of N. caninum infection (p=0.0133). The IFAT is a suitable method to diagnose N. caninum, Sarcocystis spp. and T. gondii infection in buffaloes for detecting IgG antibodies. This study demonstrates the presence of these three protozoa in buffalo herds in RS, Brazil, which may be source of infection to other animals. The high frequency of animals positive for N. caninum is important and could be related to reproductive problems. Additionally, the presence of Sarcocystis spp. and T. gondii in buffaloes can be a possible public health issue.

Abstract in Portuguese:

RESUMO.- Portella L.P., Cadore G.C., Lima M., Sangioni L.A., Fischer G. & Vogel F.S.F. 2016. Antibodies against Neospora caninum, Sarcocystis spp. and Toxoplasma gondii detected in buffaloes from Rio Grande do Sul, Brazil. [Anticorpos contra Neospora caninum, Sarcocystis spp. e Toxoplasma gondii detectados em búfalos no Rio Grande do Sul.] Pesquisa Veterinária Brasileira 36(10):947-950. Laboratório de Doenças Parasitárias, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Camobi, Santa Maria, RS 97105-900, Brazil. E-mail: fefevogel@gmail.com A presença de anticorpos contra Neospora caninum, Sarcocystis spp. e Toxoplasma gondii foi avaliada em búfalos (Bubalus bubalis) no estado do Rio Grande do Sul (RS), Região Sul do Brasil. Amostras de soro de 220 bubalinos foi analisada para presença de anticorpos, através de reação de imunofluorescência indireta (RIFI). Foram consideradas positivas as amostras que apresentaram títulos de anticorpos maiores ou iguais a 100, para os protozoários estudados. Um total de 60,5% (133/220) das amostras sorológicas dos búfalos foram positivas para pelo menos um dos parasitas pesquisados. Anticorpos para N. caninum, Sarcocystis spp. e T. gondii foram encontrados em 36,4% (80/220); 25,5% (56/220) e 16,8% (37/220) dos búfalos respectivamente, indicando que houve uma maior frequência de infecção de N. caninum em relação aos demais protozoários (p=0.0133). A RIFI é um método adequado para o diagnóstico sorológico da infecção por N. caninum, Sarcocystis spp. e T. gondii em búfalos. Este estudo demonstrou a presença destes três protozoários em bubalinos no RS, Brasil, que pode ser fonte de infecção para outros animais. A elevada ocorrência de animais positivos para N. caninum é importante e pode estar relacionada a problemas reprodutivos. Adicionalmente, a presença de Sarcocystis spp. e T. gondii em búfalos, pode significar um possível problema de saúde pública.


#8 - Eosinophilic myositis in cattle slaughtered for human consumption, 33(11):1345-1348

Abstract in English:

ABSTRACT.- Tessele B., Vielmo A., Panziera W., Gomes D.C & Barros C.S.L. 2013. [Eosinophilic myositis in cattle slaughtered for human consumption.] Miosite eosinofílica em bovinos abatidos para consumo humano. Pesquisa Veterinária Brasileira 33(11):1345-1348. De­partamento de Patologia, Universidade Federal de Santa Maria, Camobi, Santa Maria, RS 97105-900, Brazil. E-mail: claudioslbarros@uol.com.br Eosinophilic myositis is a relatively rare inflammatory condition affecting striated muscle of cattle and sheep. It has been usually associated with degenerating cysts of Sarcocystis spp., mainly S. cruzi, although this protozoan occurs in the myofibers of almost every cattle without provoking an inflammatory reaction. This paper reports the gross and histopathological findings of eosinophilic myositis in three cattle slaughtered for meat production for human consumption. Grossly lesions were pale yellow, occasionally with a greenish hue, 2-6mm spots or strikes in the myocardium of the three cattle and in the masseter muscle of one of them. Microscopically there were granulomatous lesions surrounding a core of dead and degenerating eosinophils and occasional fragment components of Sarcocystis. Immunohistochemistry performed with a policlonal anti-Neospora caninum antibody in the myocardium of one of the cattle marked intact cysts in normal myofibers and intralesional fragments of disrupted cyst amidst areas with strong inflammatory reaction. This latter finding corroborates the opinion of those in favor of Sarcocystis spp. playing a role in the causation of eosinophilic myositis.

Abstract in Portuguese:

RESUMO.- Tessele B., Vielmo A., Panziera W., Gomes D.C & Barros C.S.L. 2013. [Eosinophilic myositis in cattle slaughtered for human consumption.] Miosite eosinofílica em bovinos abatidos para consumo humano. Pesquisa Veterinária Brasileira 33(11):1345-1348. De­partamento de Patologia, Universidade Federal de Santa Maria, Camobi, Santa Maria, RS 97105-900, Brazil. E-mail: claudioslbarros@uol.com.br Miosite eosinofílica é uma condição inflamatória relativamente rara que afeta os músculos estriados de bovinos e ovinos. A lesão é usualmente associada a cistos degenerados de Sarcocystis spp., principalmente S. cruzi embora esse protozoário ocorra associado às miofibras de praticamente qualquer bovino, sem provocar, na grande maioria das vezes, reação inflamatória. Esse artigo relata os achados macro e microscópicos da miosite eosinofílica em três bovinos abatidos para produção de carne para consumo humano. Macroscopicamente, as lesões consistiam de manchas ou linhas amarelo-pálidas, ocasionalmente esverdeadas, de 2-6mm no miocárdio de três bovinos e no músculo masseter de um deles. Microscopicamente, as lesões consistiam de acúmulos inflamatórios granulomatosos circundando um centro constituído por eosinófilos mortos e degenerados e ocasionais fragmentos de Sarcocystis sp. A imuno-histoquímica realizada no miocárdio de um dos bovinos com um anticorpo policlonal anti-Neospora caninum marcou cistos intactos em miofibras normais e fragmentos de cistos em meio a áreas de intensa reação inflamatória. Esse último achado corrobora a opinião dos que apontam Sarcocystis sp. como tendo participação na causa da miosite eosinofílica.


#9 - Sarcocystis cruzi (Apicomplexa: Sarcocystidae) no cachorro-do-mato (Cerdocyon thous), p.561-564

Abstract in English:

ABSTRACT.- Rodrigues J., Meireles G.S., Carvalho Filho P.R., Ribeiro C.T., Flausino W. & Lopes C.W.G. 2008. [Sarcocystis cruzi (Apicomplexa: Sarcocystidae) in the crab-eating fox (Cerdocyon thous).] Sarcocystis cruzi (Apicomplexa: Sarcocystidae) no cachorro-do-mato (Cerdocyon thous). Pesquisa Veterinária Brasileira 28(11):561-564. Departamento de Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil. E-mail: lopescwg@ufrrj.br Sporocysts of Sarcocystis were identified in feces samples of a crab-eating fox, and were orally given to a suckling calf; after 3 months of infection, sarcocysts morphologically similar to Sarcocystis cruzi were observed in cardiac and skeletal striated muscles. The cardiac muscles of this calf were orally given to a puppy free of coccidia, that shed sporocysts in its feces.with a prepatent and patent period of 11 and 12 days after infection, respectively. To compare the morphology of the sporocysts and cysts, a second puppy was fed on bovine cardiac muscles infected naturally, and sporocysts identical to those shed by the first dog were recovered from its feces. In spite of the significant difference between sporocysts found in the mucosa of the crab-eating fox and those shed by the first and second puppies, the species observed in this study was considered to be Sarcocystis cruzi, based on size of the sporocyts, morphology of the cyst wall, and the pray-predator cycle.

Abstract in Portuguese:

ABSTRACT.- Rodrigues J., Meireles G.S., Carvalho Filho P.R., Ribeiro C.T., Flausino W. & Lopes C.W.G. 2008. [Sarcocystis cruzi (Apicomplexa: Sarcocystidae) in the crab-eating fox (Cerdocyon thous).] Sarcocystis cruzi (Apicomplexa: Sarcocystidae) no cachorro-do-mato (Cerdocyon thous). Pesquisa Veterinária Brasileira 28(11):561-564. Departamento de Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil. E-mail: lopescwg@ufrrj.br Sporocysts of Sarcocystis were identified in feces samples of a crab-eating fox, and were orally given to a suckling calf; after 3 months of infection, sarcocysts morphologically similar to Sarcocystis cruzi were observed in cardiac and skeletal striated muscles. The cardiac muscles of this calf were orally given to a puppy free of coccidia, that shed sporocysts in its feces.with a prepatent and patent period of 11 and 12 days after infection, respectively. To compare the morphology of the sporocysts and cysts, a second puppy was fed on bovine cardiac muscles infected naturally, and sporocysts identical to those shed by the first dog were recovered from its feces. In spite of the significant difference between sporocysts found in the mucosa of the crab-eating fox and those shed by the first and second puppies, the species observed in this study was considered to be Sarcocystis cruzi, based on size of the sporocyts, morphology of the cyst wall, and the pray-predator cycle.


#10 - Aborto ovino associado com infecção por Sarcocystis sp., p.393-397

Abstract in English:

ABSTRACT.- Pescador C.A., Corbellini L.G., Oliveira E.C., M. Bandarra P.M., Leal J.S., Pedroso P.M.O. & Driemeier D. 2007. [Ovine abortion associated with Sarcocystis sp. infection.] Aborto ovino associado com infecção por Sarcocystis sp. Pesquisa Veterinária Brasileira 27(10):393-397. Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS 91540-000, Brazil. E-mail: davetpat@ufrgs.br Protozoal infection has worldwide distribution and may cause abortion, premature parturition or fetal death in almost all domestic animals. In July 2004, eight Corriedale sheep showed abortion and stillbirth in the third trimester of gestation. Of these reproductive losses, one stillborn male was submitted to the Laboratory of Veterinary Pathology for necropsy investigation. The direct immunofluorescence test for Leptospira sp. was negative. No significant bacteria was isolated from lung and liver by aerobic and microaerobic cultures. Macroscopic lesions were not found in any fetal tissue. The histological lesions were observed mainly in the brain and heart and consisted primarily of severe multifocal nonsupurative encephalitis and nonsuppurative myocarditis. Schizonts of a protozoan parasite consistent with Sarcocystis sp. were found in the endothelial cells and vascular endothelium in several organs. Many schizonts with merozoites arranged in a rosette-like pattern were observed in brain and kidney tissues. In sections stained with periodic acid-Schiff (PAS), the limiting membrane of some schizonts appeared to be weakly PAS-positive. Merozoites and nuclei were PAS-negative. Protozoa did not react immunohistochemically to the antibody anti-Toxoplasma gondii; however, cross-reactivity was observed with Neospora caninum antibody. These findings were consistent with the diagnosis of Sarcocystis sp.

Abstract in Portuguese:

ABSTRACT.- Pescador C.A., Corbellini L.G., Oliveira E.C., M. Bandarra P.M., Leal J.S., Pedroso P.M.O. & Driemeier D. 2007. [Ovine abortion associated with Sarcocystis sp. infection.] Aborto ovino associado com infecção por Sarcocystis sp. Pesquisa Veterinária Brasileira 27(10):393-397. Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS 91540-000, Brazil. E-mail: davetpat@ufrgs.br Protozoal infection has worldwide distribution and may cause abortion, premature parturition or fetal death in almost all domestic animals. In July 2004, eight Corriedale sheep showed abortion and stillbirth in the third trimester of gestation. Of these reproductive losses, one stillborn male was submitted to the Laboratory of Veterinary Pathology for necropsy investigation. The direct immunofluorescence test for Leptospira sp. was negative. No significant bacteria was isolated from lung and liver by aerobic and microaerobic cultures. Macroscopic lesions were not found in any fetal tissue. The histological lesions were observed mainly in the brain and heart and consisted primarily of severe multifocal nonsupurative encephalitis and nonsuppurative myocarditis. Schizonts of a protozoan parasite consistent with Sarcocystis sp. were found in the endothelial cells and vascular endothelium in several organs. Many schizonts with merozoites arranged in a rosette-like pattern were observed in brain and kidney tissues. In sections stained with periodic acid-Schiff (PAS), the limiting membrane of some schizonts appeared to be weakly PAS-positive. Merozoites and nuclei were PAS-negative. Protozoa did not react immunohistochemically to the antibody anti-Toxoplasma gondii; however, cross-reactivity was observed with Neospora caninum antibody. These findings were consistent with the diagnosis of Sarcocystis sp.


Colégio Brasileiro de Patologia Animal SciELO Brasil CAPES CNPQ UNB UFRRJ CFMV