PESQUISA VETERINÁRIA BRASILEIRA

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.

• Sarcocystis sp. abortion stillbirth sheep

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.

Abstract in English:

ABSTRACT.- Pescador C.A., Oliveira E.C., Pedroso P.M.O., Bandarra P.M., Okuda L.H., Corbellini L.G. & Driemeier D. 2007. [Reproductive losses linked to Toxoplasma gondii infection in goats in southern Brazil.] Perdas reprodutivas associadas com infecção por Toxoplasma gondii em caprinos no sul do Brasil. Pesquisa Veterinária Brasileira 27(4):167-171. 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 Toxoplasma gondii was implicated with reproductive losses in a goat herd in Rio Grande do Sul, Brazil. Gross changes were present in 2 out of 6 fetuses/offsprings submitted for diagnosis and included enlarged, pale mesenteric lymph nodes, and edematous, mottled red and tan lungs. Microscopic changes were observed in most fetuses and were especially characterized by lymphoplasmacytic infiltration in the brain and lungs. Other histological changes included lymphoplasmacytic interstitial nephritis, necrotizing lymphadenitis and periportal lympho-plasmacytic cell infiltrates. While bacteriological and direct immunofluorescent antibody tests for Leptospira sp. were negative in samples from all cases, immunohistochemical and PCR procedures for Toxoplasma gondii reacted positively in most of them. Antibody titles against T. gondii varying from 1:512 to 1:2048 were detected in serum samples from the mother goats of these aborted (1), stillborn (3) or dead newborn (2) kids. This paper describes the clinical, pathological, serological, molecular and immunohistochemical findings of a Toxoplasma gondii-infected goat flock.

• Abortion goat reproductive losses stillborn Toxoplasma gondii

Abstract in Portuguese:

ABSTRACT.- Pescador C.A., Oliveira E.C., Pedroso P.M.O., Bandarra P.M., Okuda L.H., Corbellini L.G. & Driemeier D. 2007. [Reproductive losses linked to Toxoplasma gondii infection in goats in southern Brazil.] Perdas reprodutivas associadas com infecção por Toxoplasma gondii em caprinos no sul do Brasil. Pesquisa Veterinária Brasileira 27(4):167-171. 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 Toxoplasma gondii was implicated with reproductive losses in a goat herd in Rio Grande do Sul, Brazil. Gross changes were present in 2 out of 6 fetuses/offsprings submitted for diagnosis and included enlarged, pale mesenteric lymph nodes, and edematous, mottled red and tan lungs. Microscopic changes were observed in most fetuses and were especially characterized by lymphoplasmacytic infiltration in the brain and lungs. Other histological changes included lymphoplasmacytic interstitial nephritis, necrotizing lymphadenitis and periportal lympho-plasmacytic cell infiltrates. While bacteriological and direct immunofluorescent antibody tests for Leptospira sp. were negative in samples from all cases, immunohistochemical and PCR procedures for Toxoplasma gondii reacted positively in most of them. Antibody titles against T. gondii varying from 1:512 to 1:2048 were detected in serum samples from the mother goats of these aborted (1), stillborn (3) or dead newborn (2) kids. This paper describes the clinical, pathological, serological, molecular and immunohistochemical findings of a Toxoplasma gondii-infected goat flock.

Abstract in English:

Corrêa A.M.R., Pescador C.A., Schmitz M., Zlotowski P., Rozza D.B., Oliveira E.C., Barcellos D.E. & Driemeier D. 2006. [Clinical and pathological aspects of swine circovirosis in Rio Grande do Sul, southern Brazil.] Aspectos clínico-patológicos associados à circovirose suína no Rio Grande do Sul. Pesquisa Veterinária Brasileira 26(1):9-13. Setor de Patologia Veterinária, Faculdade de Veterinária, UFRGS, Av. Bento Gonçalves 9090, Porto Alegre, RS 91540-000, Brazil. E-mail: davetpat@ufrgs.br A total of 97 pigs, which had presented wasting, lymphadenomegaly, respiratory distress and pale or icteric mucosa, was necropsied over a 6-month period. Macroscopic lesions were characterized mostly by enlarged lymph nodes, non collapsed and round edged lungs with cranio-ventral areas of consolidation and interlobular edema. Kidneys had increased size, were pale, and presented numerous scattered white spots projecting from surface to the cortical area. Some kidneys also showed small red spots similar to petechial hemorrhage over the cortex. Main microscopic lesions were lympho-histiocytic infiltration in lymph nodes, lungs, and kidneys. Immunohistochemical probing with polyclonal antisera to type II swine circovirus stained positively in 50 out of the 56 cases tested (89.2%).

• Circovirus PMWS PCV2 immunohistochemistry swine.

Abstract in Portuguese:

Corrêa A.M.R., Pescador C.A., Schmitz M., Zlotowski P., Rozza D.B., Oliveira E.C., Barcellos D.E. & Driemeier D. 2006. [Clinical and pathological aspects of swine circovirosis in Rio Grande do Sul, southern Brazil.] Aspectos clínico-patológicos associados à circovirose suína no Rio Grande do Sul. Pesquisa Veterinária Brasileira 26(1):9-13. Setor de Patologia Veterinária, Faculdade de Veterinária, UFRGS, Av. Bento Gonçalves 9090, Porto Alegre, RS 91540-000, Brazil. E-mail: davetpat@ufrgs.br A total of 97 pigs, which had presented wasting, lymphadenomegaly, respiratory distress and pale or icteric mucosa, was necropsied over a 6-month period. Macroscopic lesions were characterized mostly by enlarged lymph nodes, non collapsed and round edged lungs with cranio-ventral areas of consolidation and interlobular edema. Kidneys had increased size, were pale, and presented numerous scattered white spots projecting from surface to the cortical area. Some kidneys also showed small red spots similar to petechial hemorrhage over the cortex. Main microscopic lesions were lympho-histiocytic infiltration in lymph nodes, lungs, and kidneys. Immunohistochemical probing with polyclonal antisera to type II swine circovirus stained positively in 50 out of the 56 cases tested (89.2%).

Abstract in English:

ABSTRACT.- Souza V.F, Melo S.V., Esteves P.A., Schmidt C.S.R., Gonçalves D.A., Schaefer R., Silva T.C., Almeida R.S., Vicentini F., Franco A.C., Oliveira E.A., Spilki F.R., Weiblen R., Flores E.F., Lemos R.A., Alfieri A.A., Pituco E.M. & Roehe P.M. 2002. [Monoclonal antibody characterization of bovine herpesviruses types 1 (BHV-1) and 5 (BHV-5).] Caracterização de herpesvírus bovinos tipos 1 (BHV-1) e 5 (BHV-5) com anticorpos monoclonais. Pesquisa Veterinária Brasileira 22(1):13-18,-Depto Microbiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, and Centro de Pesquisas Universitárias Desidério Finamor, Estrada do Conde 6000, Eldorado do Sul, RS 90001-970, Brazíl. E-mail: proehe@vottex.ufrgs.br The antigenic profile of 45 herpesviruses (44 viruses from cattle, including six reference BHV-1 strains and 15 putative BHV-1; three reference BHV-5 strains and 20 putative BHV-5) and one butfalo isolate (BuHV) were examined with a panei of monoclonal antibodies (Mabs) prepared against bovine herpesvirus antigens. Tests were performed by immunoperoxidase (IPX) on infected cell cultures, with the Mabs as primary antibodies. lmmunostaining allowed the differentiation between types 1 and 5 viruses. Ali isolates from cases of encephalitis displayed BHV-5 profiles. Four BHV-5 isolates obtained from geographically distinct áreas displayed different and highly variable IPX patterns of reactivity. Two viruses with BHV-5 antigenic profile were isolated from semen of asymptomatic bulis. The results showed that the antigenic characterization with the Mab panei employed here is useful for typing BHV-1 and BHV-5 isolates.

• Bovine herpesvirus BHV-1 BHV-5 monoclonal antibodies immunoperoxidase Herpesvírus bovino 1 herpesvírus bovino 5 anticorpos monoclonais imunoperoxidase.

Abstract in Portuguese:

RESUMO.- Souza V.F, Melo S.V., Esteves P.A., Schmidt C.S.R., Gonçalves D.A., Schaefer R., Silva T.C., Almeida R.S., Vicentini F., Franco A.C., Oliveira E.A., Spilki F.R., Weiblen R., Flores E.F., Lemos R.A., Alfieri A.A., Pituco E.M. & Roehe P.M. 2002. [Monoclonal antibody characterization of bovine herpesviruses types 1 (BHV-1) and 5 (BHV-5).] Caracterização de herpesvírus bovinos tipos 1 (BHV-1) e 5 (BHV-5) com anticorpos monoclonais. Pesquisa Veterinária Brasileira 22(1):13-18,-Depto Microbiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, and Centro de Pesquisas Universitárias Desidério Finamor, Estrada do Conde 6000, Eldorado do Sul, RS 90001-970, Brazíl. E-mail: proehe@vottex.ufrgs.br O perfil antigénico de 45 herpesvírus (44 de bovinos, sendo seis amostras de referência de BHV-1 e 15 prováveis BHV-1; três amostras de referência de BHV-5 e 20 prováveis BHV-5) e uma amostra de herpesvírus bubalino (BuHV) foi examinado com um painel de anticorpos monoclonais (Acms) produzidos contra antígenos de herpesvírus bovinos. Para os exames, foi utilizada a prova de imunoperoxidase (IPX) sobre cultivas de células infectadas, tendo os Acms como anticorpos primários. A determinação dos padrões de reatividade das amostras de vírus frente aos Acms permitiu a diferenciação entre os tipos 1 e 5. Todas as amostras isoladas de casos de encefalite apresentaram perfil de BHV-5. Quatro amostras de BHV-5 isoladas de áreas geograficamente distintas apresentaram perfis de reatividade diferenciados em relação às demais amostras do tipo 5. Duas amostras de vírus com perfil antigénico de BHV-5 foram isoladas de sêmen de animais infectados. Estes resultados comprovam a utilidade da caracterização antigénica com este painel de Acms na tipagem de amostras de BHV-1 e BHV-5.