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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sul. Para informações adicionais entre em contato com cppsul.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
05/09/2018 |
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Data da última atualização: |
05/09/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ECHEVARRIA, F. A. M.; GETTINBY, G.; HAZELWOOD, S. |
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Afiliação: |
FLAVIO AUGUSTO MENEZES ECHEVARRIA, CPPSUL; G. Gettinby, University of Strathclyde; S. Hazelwood, University of Glasgow. |
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Título: |
Model predictions for anthelmintic resistance amongst Haemonchus contortus populations in southern Brazil. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Veterinary Parasitology, v. 47, n. 3-4, p. 315-325, May 1993. |
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Idioma: |
Inglês |
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Conteúdo: |
A computer model developed to study Ostertagia circumcincta resistance to anthelmintics in UK sheep flocks has been adapted for use with Haemonchus contortus under southern Brazilian conditions. The model simulates the effect of different anthelmintic control regimens on the year-to-year pattern of resistance in breeding ewes. The nematode control regimen most used by Brazilian sheep farmers was found to increase the frequency of genes which confer resistance from approximately 3% to 14% in an H. contortus population over a 20 year period. The effect of early versus late season anthelmintic treatment was investigated. This indicated that early season treatment would select for resistance rapidly, whereas late season treatments would not, owing to large numbers of untreated parasites accumulating at the beginning of the season. A model which can predict the development of anthelmintic resistance in parasites of ewes is a valuable tool in the understanding of the effect of different strategies on nematode control programmes and merits further consideration. |
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Thesagro: |
Nematóide; Parasito de Animal; Parasitose. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01640naa a2200181 a 4500
001 2095127
005 2018-09-05
008 1993 bl uuuu u00u1 u #d
100 1 $aECHEVARRIA, F. A. M.
245 $aModel predictions for anthelmintic resistance amongst Haemonchus contortus populations in southern Brazil.$h[electronic resource]
260 $c1993
520 $aA computer model developed to study Ostertagia circumcincta resistance to anthelmintics in UK sheep flocks has been adapted for use with Haemonchus contortus under southern Brazilian conditions. The model simulates the effect of different anthelmintic control regimens on the year-to-year pattern of resistance in breeding ewes. The nematode control regimen most used by Brazilian sheep farmers was found to increase the frequency of genes which confer resistance from approximately 3% to 14% in an H. contortus population over a 20 year period. The effect of early versus late season anthelmintic treatment was investigated. This indicated that early season treatment would select for resistance rapidly, whereas late season treatments would not, owing to large numbers of untreated parasites accumulating at the beginning of the season. A model which can predict the development of anthelmintic resistance in parasites of ewes is a valuable tool in the understanding of the effect of different strategies on nematode control programmes and merits further consideration.
650 $aNematóide
650 $aParasito de Animal
650 $aParasitose
700 1 $aGETTINBY, G.
700 1 $aHAZELWOOD, S.
773 $tVeterinary Parasitology$gv. 47, n. 3-4, p. 315-325, May 1993.
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Embrapa Pecuária Sul (CPPSUL) |
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| 3. |  | LIMA, G. T. de; RODRIGUES, T. S.; PORTILHO, A. I.; CORREA, V. A.; GASPAR, E. B.; DE GASPARI, E. Immune responses of meningococcal B outer membrane vesicles in middle-aged mice. Pathogens and Disease, v. 78, n. 5, ftaa028, July, 2020.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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| 4. | | BRITO, L. T.; RINALDI, F. M.; GASPAR, E. B.; CORREA, V. A.; GONÇALVES, C. A.; PORTILHO, A. I.; LIMA, G. T. de; GASPARI, E. DE. Study of different routes of immunization using outer membranevesicles ofNeisseria meningitidisB and comparison of two adjuvants. Vaccine, v. 38, n. 48, p. 7674-7682, Nov. 2020.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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