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Registro Completo |
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
09/08/1995 |
Data da última atualização: |
05/04/2017 |
Autoria: |
NANTULYA, V. M.; MUSOKE, A. J.; RURANGIRWA, F. R.; MOLOO, S. K. |
Título: |
Resistance of cattle to tsetse-transmitted challenge with Trypanosoma brucei or Trypanosoma congolense after spontaneous recovery from syringe passaged infections. |
Ano de publicação: |
1984 |
Fonte/Imprenta: |
Infection and Immunity, v.43, n.2, p.735-738, 1984. |
Idioma: |
Inglês |
Conteúdo: |
Groups of cattle were inoculated intravenously with cloned populations of bloodstream forms of Trypanosoma brucei or Trypanosoma congolense. All five steers infected with T. brucei IL Tat 2.1 and six of the eight sters infected with T. congolense IL 13-E14 became aparsitemic within 16 and 32 weeks postinfection, respectively. Examination of sera from animals infected with T. brucei by indirect immunofluorescence and neutralization assays revealed the presence of antibodies against all the metacyclic variable antigen types (VATs) of the infecting clone. The neutralizing capacity of the sera increased with the course of infection from 1:10 at 2 monts to 1:100 at 3 to 4 months postinfection. The recovered animals were completely immune to challenge by Glossina morsitans subsp. centralis infected with clone IL Tat 2.1 which had initiated the infection, as well as wich another clone (IL Tat 2.2) belonging to the same serodeme but they were susceptible to a tsetse-transmited heterologous challenge with isolate STIB 367-H. Similar results were obtained with sera from T. congolense IL 13-E14-infected steers. The six steers inbfected with a different T. congolense IL Nat 3.1 clone did not recover spotaneously; however, 2 months postinfection, sera from five of them also contained neutralizing antibodies against IL Nat 3.1 metacyclic VATs. These results indicate that some of the bloodstream VATs that arise during the course of a chronic infection possess surface epitopes in their variable surface glycoproteins that are identical to those of the metacyclic VATs. It is suggested that in chronic infection, the infecting trypanosomes could exhaust their VAT repertoire, including those that cross-react with metacyclies, threby leading to both self-cure and subsequent immunity to homologous cyclically transmited challenge. MenosGroups of cattle were inoculated intravenously with cloned populations of bloodstream forms of Trypanosoma brucei or Trypanosoma congolense. All five steers infected with T. brucei IL Tat 2.1 and six of the eight sters infected with T. congolense IL 13-E14 became aparsitemic within 16 and 32 weeks postinfection, respectively. Examination of sera from animals infected with T. brucei by indirect immunofluorescence and neutralization assays revealed the presence of antibodies against all the metacyclic variable antigen types (VATs) of the infecting clone. The neutralizing capacity of the sera increased with the course of infection from 1:10 at 2 monts to 1:100 at 3 to 4 months postinfection. The recovered animals were completely immune to challenge by Glossina morsitans subsp. centralis infected with clone IL Tat 2.1 which had initiated the infection, as well as wich another clone (IL Tat 2.2) belonging to the same serodeme but they were susceptible to a tsetse-transmited heterologous challenge with isolate STIB 367-H. Similar results were obtained with sera from T. congolense IL 13-E14-infected steers. The six steers inbfected with a different T. congolense IL Nat 3.1 clone did not recover spotaneously; however, 2 months postinfection, sera from five of them also contained neutralizing antibodies against IL Nat 3.1 metacyclic VATs. These results indicate that some of the bloodstream VATs that arise during the course of a chronic infection possess surface epitopes in their vari... Mostrar Tudo |
Thesaurus Nal: |
Trypanosoma brucei; Trypanosoma congolense. |
Categoria do assunto: |
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Marc: |
LEADER 02445naa a2200181 a 4500 001 1785403 005 2017-04-05 008 1984 bl --- 0-- u #d 100 1 $aNANTULYA, V. M. 245 $aResistance of cattle to tsetse-transmitted challenge with Trypanosoma brucei or Trypanosoma congolense after spontaneous recovery from syringe passaged infections. 260 $c1984 520 $aGroups of cattle were inoculated intravenously with cloned populations of bloodstream forms of Trypanosoma brucei or Trypanosoma congolense. All five steers infected with T. brucei IL Tat 2.1 and six of the eight sters infected with T. congolense IL 13-E14 became aparsitemic within 16 and 32 weeks postinfection, respectively. Examination of sera from animals infected with T. brucei by indirect immunofluorescence and neutralization assays revealed the presence of antibodies against all the metacyclic variable antigen types (VATs) of the infecting clone. The neutralizing capacity of the sera increased with the course of infection from 1:10 at 2 monts to 1:100 at 3 to 4 months postinfection. The recovered animals were completely immune to challenge by Glossina morsitans subsp. centralis infected with clone IL Tat 2.1 which had initiated the infection, as well as wich another clone (IL Tat 2.2) belonging to the same serodeme but they were susceptible to a tsetse-transmited heterologous challenge with isolate STIB 367-H. Similar results were obtained with sera from T. congolense IL 13-E14-infected steers. The six steers inbfected with a different T. congolense IL Nat 3.1 clone did not recover spotaneously; however, 2 months postinfection, sera from five of them also contained neutralizing antibodies against IL Nat 3.1 metacyclic VATs. These results indicate that some of the bloodstream VATs that arise during the course of a chronic infection possess surface epitopes in their variable surface glycoproteins that are identical to those of the metacyclic VATs. It is suggested that in chronic infection, the infecting trypanosomes could exhaust their VAT repertoire, including those that cross-react with metacyclies, threby leading to both self-cure and subsequent immunity to homologous cyclically transmited challenge. 650 $aTrypanosoma brucei 650 $aTrypanosoma congolense 700 1 $aMUSOKE, A. J. 700 1 $aRURANGIRWA, F. R. 700 1 $aMOLOO, S. K. 773 $tInfection and Immunity$gv.43, n.2, p.735-738, 1984.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registros recuperados : 35 | |
21. | | TEIXEIRA, H. C. A.; SILVA, B. D. M.; SILVA, T. A. S. N.; PAIVA NETO, M. A.; NEVES, J. P.; RAMOS, A. F. Luteal volume and progesterone serum concentration in Santa Ines sheep sinchronize with GnRH in a long or a short protocols. Acta Scientiae Veterinariae, Porto Alegre, v. 38, supl. 2, p. s347-s352, 2010. Abstract 64. Edição dos resumos da 24. Reunião Anual da Sociedade Brasileira de Tecnologia de Embriões, Porto de Galinhas, PE, 2010.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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22. | | SILVA, P. C. P.; BRASIL, O. O.; SOUTO, P. L. G.; MOREIRA, N. H.; SILVA, J. P. da; SILVA, B. D. M.; RAMOS, A. F. Fixed-time artificial insemination protocols on brazilian locally adapted breed gilts on ovulatory response and embryo production. Animal Reproduction, v. 18, n. 1, e20200776, 2021.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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24. | | SILVA, B. D. M.; SILVA, T. A. S. N.; MOREIRA, N. H.; TEIXEIRA, H. C. A.; PAIVA NETO, M. A.; NEVES, J. P.; RAMOS, A. F. Ovulation induction in ewes using GnRH in long and short-term synchronization protocols. Animal Reproduction, v. 12, n. 2, p.312-315, Apr./Jun. 2015.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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25. | | BRASIL, O. O.; MOREIRA, N. H.; SILVA, T. A. S. N.; SILVA, B. D. M.; NASCIMENTO, N. V. do; FACO, O.; RAMOS, A. F. Produção de embriões em ovinos Morada Nova e Somalis Brasileira. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 68, n. 5, p. 1390-1394, 2016.Tipo: Nota Técnica/Nota Científica | Circulação/Nível: A - 2 |
Biblioteca(s): Embrapa Caprinos e Ovinos; Embrapa Recursos Genéticos e Biotecnologia. |
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26. | | BRASIL, O. O.; MOREIRA, N. H.; SILVA, B. D. M.; NASCIMENTO, N. V. do; SILVA, T. A. DE S. N.; FACO, O.; RAMOS, A. F. Produção embrionária de ovinos Morada Nova E Somalis Brasileiro utilizando protocolo com indutor de ovulação. In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 2., 2012, Belém, PA. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2012. 1 CD-ROM. 1 CD-ROM.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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27. | | CARVALHO, B. P.; CUNHA, A. T. M.; SILVA, B. D. M.; SOUSA, R. V. de; LEME, L. O.; DODE, M. A. N.; MELO, E. de O. Production of transgenic cattle by somatic cell nuclear transfer (SCNT) with the human granulocyte colony-stimulation factor (hG-CSF). Journal of Animal Science and Technology, v. 61, n. 2, p. 61-68, 2019. Na publicação: Regivaldo V. Sousa, Eduardo O. Melo.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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29. | | CARVALHO, J. O.; SPRÍCIGO, J. F. W.; SILVA, L. P. da; LEME, L. O.; SILVA, B. D. M.; GUIMARÃES, A. L. S.; RAMOS, A. F.; DODE, M. A. N. Caracterização do perfil lipídico de embriões suínos da raça Piau. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE TECNOLOGIA DE EMBRIÕES, 29., 2015, Gramado. Anais... [S.l.]: SBTE, 2015. p. 375.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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30. | | SPRÍCIGO, J. F. W.; DIÓGENES, M. N.; LEME, L. O.; GUIMARÃES, N. L.; MUTERLLE, C. V.; SILVA, B. D. M.; SOLÀ-ORIOL, D.; PIVATO, I.; SILVA, L. P.; DODE, M. A. N. Effects of different maturation systems on bovine oocyte quality, plasma membrane phospholipid composition and resistance to vitrification and warming. PLOS One, v. 10, n. 6, June 2015. 18 p. (Open Access).Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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31. | | MELO, E. O.; SILVA, B. D. M.; CASTRO, E. A.; SILVA, T. A. S. N.; PAIVA, S. R.; SARTORI, R.; FRANCO, M. M.; SOUZA, C. J. H. de; NEVES, J. P. A novel mutation in the growth and differentiation factor 9 (GDF9) gene is associated, in homozygosis, with increased ovulation rate in Santa Ines sheep. In: ANNUAL MEETING OF THE SOCIETY FOR THE STUDY OF REPRODUCTION, 41., 2008, Kailua-Kona. Reproductive biology: basic discoveries that affect our lives: electronic proceedings. Madison: SSR, 2008.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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32. | | SILVA, B. D. M.; CASTRO, E. A.; SOUZA, C. J. H. de; PAIVA, S. R.; SARTORI, R.; FRANCO, M. M.; AZEVEDO, H. C.; SILVA, T. A. S. N.; VIEIRA, A. M. C.; NEVES, J. P.; MELO, E. de O. A new polymorphism in the Growth and Differentiation Factor 9 (GDF9) gene is associated with increased ovulation rate and prolificacy in homozygous sheep. Animal Genetics, Oxford, v. 42, n. 1, p. 89-92, Jan. 2011.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Pecuária Sul; Embrapa Recursos Genéticos e Biotecnologia. |
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33. | | SPRÍCIGO, J. F. W.; LEME, L. O.; GUIMARÃES, A. L.; OLIVEIRA NETO, J. C.; SILVA, P. C. P.; MOREIRA, N. H.; PIVATO, I.; SILVA, B. D. M.; RAMOS, A. F.; DODE, M. A. N. Phospholipid composition and resistance to vitrification of in vivo blastocyst of a Brazilian naturalized porcine breed. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 71, n. 3, p. 837-847, 2019.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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34. | | NOCHI, A. R. F.; VARGAS, L. N.; SARTORI, R.; GUIMARAES JUNIOR, R.; ARAÚJO, D. B.; FIGUEIREDO, R. A.; TOGAWA, R. C.; COSTA, M. M. do C.; GRYNBERG, P.; MENDONÇA, A. S.; KUSSANO, N. R.; PIVATO, I.; SILVA, B. D. M.; SPRICIGO, J. F. W.; LEME, L. O.; SILVA, J. P. da; CAETANO, A. R.; DODE, M. A. N.; FRANCO, M. M. Low levels of sulfur and cobalt during the pre- and periconceptional periods affect the oocyte yield of donors and the DNA methylome of preimplantation bovine embryos. Journal of Developmental Origins of Health and Disease, v. 13, p. 231-243, 2022. Na publicação: Marcos M. C. Costa.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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35. | | NOCHI, A. R. F.; VARGAS, L. N.; SARTORI, R.; GUIMARAES JUNIOR, R.; ARAÚJO, D. B.; FIGUEIREDO, R. A.; TOGAWA, R. C.; COSTA, M. M.; GRYNBERG, P.; MENDONÇA, A. S.; KUSSANO, N. R.; PIVATO, I.; SILVA, B. D. M.; SPRICIGO, J. F. W.; LEME, L. O.; SILVA, J. P. da; CAETANO, A. R.; DODE, M. A. N.; FRANCO, M. M. Low levels of sulfur and cobalt during the pre- and periconceptional periods affect the oocyte yield of donors and the DNA methylome of preimplantation bovine embryos. Journal of Developmental Origins of Health and Disease, 2021. 13 p.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
Biblioteca(s): Embrapa Cerrados. |
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Registros recuperados : 35 | |
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