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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
16/05/2023 |
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Autoria: |
BENITEZ-USHER, C.; ARMOUR, J.; DUNCAN, J. L.; URQUHART, G. M.; GETTINBY, G. |
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Título: |
A study of some factors influencing the immunization of sheep against Haemonchus contortus using attenuated larvae. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Veterinary Parasitology, v. 3, n. 4, p. 327-342, 1977. |
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DOI: |
https://doi.org/10.1016/0304-4017(77)90019-X |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The respective roles of age of lamb, size of immunizing dose, previous exposure to infection and anthelmintic therapy on the immune response of Scottish Blackface sheep to gamma-irradiated H. contortus larvae were studied. As previously shown, young lambs immunised at 10 and 14 weeks of age failed to develop a significant resistance to subsequent challenge. In contrast, parasite-naive lambs immunised at 9 and 10 months of age with 10 000 H. contortus larvae irradiated at 60 kiloröntgens developed a highly significant immunity to subsequent challenge. This degree of immunity was not significantly altered by the administration of spaced doses of normal larvae from 10 weeks of age until the point of vaccination. Worm-free lambs vaccinated at 9 and 10 months of age failed to develop any immunity to subsequent challenge when the anthelmintic thiabendazole was administered 3 weeks after each immunizing infection. |
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Palavras-Chave: |
Nematodeos; Ruminantes. |
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Thesagro: |
Parasitologia. |
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Thesaurus Nal: |
Immune response; Lambs; Parasitology; Sheep diseases. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 01733naa a2200265 a 4500
001 1521106
005 2023-05-16
008 1977 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/0304-4017(77)90019-X$2DOI
100 1 $aBENITEZ-USHER, C.
245 $aA study of some factors influencing the immunization of sheep against Haemonchus contortus using attenuated larvae.$h[electronic resource]
260 $c1977
520 $aAbstract: The respective roles of age of lamb, size of immunizing dose, previous exposure to infection and anthelmintic therapy on the immune response of Scottish Blackface sheep to gamma-irradiated H. contortus larvae were studied. As previously shown, young lambs immunised at 10 and 14 weeks of age failed to develop a significant resistance to subsequent challenge. In contrast, parasite-naive lambs immunised at 9 and 10 months of age with 10 000 H. contortus larvae irradiated at 60 kiloröntgens developed a highly significant immunity to subsequent challenge. This degree of immunity was not significantly altered by the administration of spaced doses of normal larvae from 10 weeks of age until the point of vaccination. Worm-free lambs vaccinated at 9 and 10 months of age failed to develop any immunity to subsequent challenge when the anthelmintic thiabendazole was administered 3 weeks after each immunizing infection.
650 $aImmune response
650 $aLambs
650 $aParasitology
650 $aSheep diseases
650 $aParasitologia
653 $aNematodeos
653 $aRuminantes
700 1 $aARMOUR, J.
700 1 $aDUNCAN, J. L.
700 1 $aURQUHART, G. M.
700 1 $aGETTINBY, G.
773 $tVeterinary Parasitology$gv. 3, n. 4, p. 327-342, 1977.
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| 1. |  | BARUSELLI, P. S.; ABREU, L. A. de; PAULA, V. R. de; CARVALHO, B. C. de; GRICIO, E. A.; MORI, F. K.; REBEIS, L. M.; ALBERTINI, S.; SOUZA, A. H. de; D'OCCHIO. Applying assisted reproductive technology and reproductive management to reduce CO2-equivalent emission in dairy and beef cattle: a review. Animal Reproduction, v. 20, n. 2, e20230060, 2023.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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