Resultado da pesquisa (3)
Termo utilizado na pesquisa Sarcocystis sp.
#1 - Infectious diseases in wild and exotic birds in Paraíba State, Northeast Brazil
Abstract in English:
Wild and exotic birds play a pivotal role in the zoonotic transmission of various infectious diseases. As reservoirs for a diverse array of infectious agents, their interaction with domestic animals can facilitate the spread of diseases, emphasizing their importance in certain disease cycles. This study describes the occurrence of infectious diseases diagnosed in Paraíba from 2013 to 2018. Out of 189 wild birds necropsied, 50 (26.45%) had infectious diseases. Bacterial infections were the most prevalent, accounting for 38 (76%) cases, followed by fungi, with 10 (20%) affected birds, and lastly, protozoa with two (4%) cases. The most affected species included the blue-fronted amazon parrot (Amazona aestiva), red-shouldered macaw (Diopsittaca nobilis), Harris’s hawk (Parabuteo unicinctus), and saffron finch (Sicalis flaveola), respectively. The predominance of bacterial diseases was often associated with secondary infections resulting from debilitating conditions such as trauma or bronchoaspiration. Chronic aspergillosis emerged as the primary fungal disease, observed in various tissues and often linked to management failures and stress. Other fungal infections were predominantly suggestive of Candida sp. The presence of protozoa was limited to Sarcocystis sp. infections in two birds with no clinical signs, but they were responsible for the death of the birds. This survey reinforces the significance of bacterial, fungal and protozoan pathogens in wild birds and highlights the need for accurate diagnostic descriptions in these species. Accordingly, the birds in this survey are considered susceptible to the infections detailed herein.
Abstract in Portuguese:
As aves silvestres e exóticas são responsáveis pelo ciclo zoonótico de diversas doenças infecciosas. As aves silvestres por sua vez, tem o papel de reservatório dos mais variados agentes infecciosos na natureza e, quando em contato com animais domésticos ou humanos, podem disseminar a enfermidade, se tornando fundamental no ciclo de algumas doenças. No presente estudo descrevem-se os casos de doenças infecciosas diagnosticadas na Paraíba de 2013 a 2018. De um total de 189 amostras de tecido de necropsia coletadas em aves silvestres e exóticas, 50 (26,45%) corresponderam a casos de doenças infecciosas. Das doenças infecciosas, as de etiologia bacteriana foram as mais prevalentes, representando 38 (76%) casos, seguidas dos fungos com 10 (20%) aves afetadas e por último dos protozoários com dois (4%) casos. As espécies mais afetadas foram papagaio-verdadeiro (Amazona aestiva), maracanã-nobre (Diopsittaca nobilis), gavião-asa-de-telha (Parabuteo unicinctus) e canário-da-terra-verdadeiro (Sicalis flaveola), respectivamente. A ocorrência maior de doenças bacterianas decorre de os casos apresentarem-se como uma doença secundária a um quadro debilitante, como, por exemplo, traumas e aspiração de conteúdo para o trato respiratório. Por vezes não foi possível uma classificação de gênero e espécie dos agentes patogênicos envolvidos. A aspergilose crônica destacou-se como a principal doença micótica e foi observada em diversos tecidos, representando uma condição primária ou secundária e, na maioria das vezes, associada a falhas de manejo e estresse. Os demais fungos foram representados por leveduras sugestivas de Candida sp. A presença de protozoários foi limitada à infecção por Sarcocystis sp. em tecidos de duas aves, sem manifestação clínica, porém foram responsáveis pela morte das aves. Este levantamento reforça a importância dos patógenos bacterianos, fúngicos e protozoários causadores de doenças em aves selvagens, bem como a descrição de diagnóstico nessas espécies. Nesse sentido, as aves desse levantamento podem ser consideradas susceptíveis às infecções descritas no presente trabalho.
#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 - 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.
