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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
10/08/2004 |
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Data da última atualização: |
10/08/2004 |
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Autoria: |
HAILE, A.; TEMBELY, S.; ANINDO, D. O.; MUKASA-MUGERWA, E.; REGE, J. E. O.; YAMI, A.; BAKER, R. L. |
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Título: |
Effects of breed and dietary protein supplementation on the responses to gastrointestinal nematode infections in Ethiopian sheep. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Small Ruminant Research, v. 44, n. 3, p. 247-261, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
The effects of breed and dietary protein supplementation on the development of resistance and resilience to gastrointestinal nematode parasites (endoparasites) were examined in artificially infected Horro and Menz lambs from 4 to 12 months of age. The factorial design involved two breeds, two infection treatments (infected vs non-infected) and three dietary protein treatments (hay and wheat bran (basal diet), hay plus molasses urea block (MUB), hay plus cotton seed cake (CSC». At the start of the study, 152 weaner lambs (103 Menz and 49 Horro) were assigned to the 12 treatment combinations each in a separate pen. Endoparasite challenge involved three infection periods (primary, secondary and tertiary) each separated by an anthelmintic treatrnent. The first two infections were with Haemonchus contortus, while the third infection was a mixed infection of H. contortus, Longistrongylus elongata and Trichostrongylus colubriformis. During the entire study, infected lambs gained significantly legs weight and had a lower blood packed cell volume (PCV) than the non-infected lambs. Protein supplementation of lambs with CSC resulted in lower faecal egg confits (FEC) and higher PCV and growth rates than lambs fed the basal diet. ln the first two infection periods there was no significant effect of infections in larnbs supplemented with MUB, probably due to low intake of MUB. ln the tertiary infection period MUB was fed ad libitum which resulted in MUB-supplemented lambs having significantly higher PCV than lambs on the basal diet, with CSC-supplemented lambs intermediate. During the primary infection, naive Horro lambs had a significantly lower FEC than Menz lambs, but there was no significant breed difference for PCV. ln the secondary infection period there was no significant breed difference for FEC or PCV in infected lambs. However, during the tertiary infection, while there was no significant breed difference for FEC, the Menz had a significantly higher PCV than Horro irrespective of infection status. At the end of the tertiary infection, the Menz lambs (n = 26) had significantly lower adult worm burdens for H. contortus and L. elongata than Horro lambs (n = 18), but there was no significant difference between the breeds for T. colubriformis worm burdens. Both the worm confit and PCV data suggest that Menz lambs acquire the ability to resist and tolerate endoparasite infections better than the Horro lambs. MenosThe effects of breed and dietary protein supplementation on the development of resistance and resilience to gastrointestinal nematode parasites (endoparasites) were examined in artificially infected Horro and Menz lambs from 4 to 12 months of age. The factorial design involved two breeds, two infection treatments (infected vs non-infected) and three dietary protein treatments (hay and wheat bran (basal diet), hay plus molasses urea block (MUB), hay plus cotton seed cake (CSC». At the start of the study, 152 weaner lambs (103 Menz and 49 Horro) were assigned to the 12 treatment combinations each in a separate pen. Endoparasite challenge involved three infection periods (primary, secondary and tertiary) each separated by an anthelmintic treatrnent. The first two infections were with Haemonchus contortus, while the third infection was a mixed infection of H. contortus, Longistrongylus elongata and Trichostrongylus colubriformis. During the entire study, infected lambs gained significantly legs weight and had a lower blood packed cell volume (PCV) than the non-infected lambs. Protein supplementation of lambs with CSC resulted in lower faecal egg confits (FEC) and higher PCV and growth rates than lambs fed the basal diet. ln the first two infection periods there was no significant effect of infections in larnbs supplemented with MUB, probably due to low intake of MUB. ln the tertiary infection period MUB was fed ad libitum which resulted in MUB-supplemented lambs having significa... Mostrar Tudo |
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Palavras-Chave: |
Etiópia; Nematóides gastrintestinais. |
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Thesagro: |
Ovino; Resistência; Suplemento Protéico. |
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Categoria do assunto: |
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Marc: |
LEADER 03182naa a2200253 a 4500
001 1530663
005 2004-08-10
008 2002 bl uuuu u00u1 u #d
100 1 $aHAILE, A.
245 $aEffects of breed and dietary protein supplementation on the responses to gastrointestinal nematode infections in Ethiopian sheep.
260 $c2002
520 $aThe effects of breed and dietary protein supplementation on the development of resistance and resilience to gastrointestinal nematode parasites (endoparasites) were examined in artificially infected Horro and Menz lambs from 4 to 12 months of age. The factorial design involved two breeds, two infection treatments (infected vs non-infected) and three dietary protein treatments (hay and wheat bran (basal diet), hay plus molasses urea block (MUB), hay plus cotton seed cake (CSC». At the start of the study, 152 weaner lambs (103 Menz and 49 Horro) were assigned to the 12 treatment combinations each in a separate pen. Endoparasite challenge involved three infection periods (primary, secondary and tertiary) each separated by an anthelmintic treatrnent. The first two infections were with Haemonchus contortus, while the third infection was a mixed infection of H. contortus, Longistrongylus elongata and Trichostrongylus colubriformis. During the entire study, infected lambs gained significantly legs weight and had a lower blood packed cell volume (PCV) than the non-infected lambs. Protein supplementation of lambs with CSC resulted in lower faecal egg confits (FEC) and higher PCV and growth rates than lambs fed the basal diet. ln the first two infection periods there was no significant effect of infections in larnbs supplemented with MUB, probably due to low intake of MUB. ln the tertiary infection period MUB was fed ad libitum which resulted in MUB-supplemented lambs having significantly higher PCV than lambs on the basal diet, with CSC-supplemented lambs intermediate. During the primary infection, naive Horro lambs had a significantly lower FEC than Menz lambs, but there was no significant breed difference for PCV. ln the secondary infection period there was no significant breed difference for FEC or PCV in infected lambs. However, during the tertiary infection, while there was no significant breed difference for FEC, the Menz had a significantly higher PCV than Horro irrespective of infection status. At the end of the tertiary infection, the Menz lambs (n = 26) had significantly lower adult worm burdens for H. contortus and L. elongata than Horro lambs (n = 18), but there was no significant difference between the breeds for T. colubriformis worm burdens. Both the worm confit and PCV data suggest that Menz lambs acquire the ability to resist and tolerate endoparasite infections better than the Horro lambs.
650 $aOvino
650 $aResistência
650 $aSuplemento Protéico
653 $aEtiópia
653 $aNematóides gastrintestinais
700 1 $aTEMBELY, S.
700 1 $aANINDO, D. O.
700 1 $aMUKASA-MUGERWA, E.
700 1 $aREGE, J. E. O.
700 1 $aYAMI, A.
700 1 $aBAKER, R. L.
773 $tSmall Ruminant Research$gv. 44, n. 3, p. 247-261, 2002.
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Embrapa Caprinos e Ovinos (CNPC) |
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| 1. |  | GARCIA, B. de O.; MOLINARI, H. B. C.; PACHECO, T. F.; KOBAYASHI, A. K.; BARBOSA, G. V. S.; PAIVA, L. V.; GUIDUCCI, R. do C. N. Análise do potencial econômico de variedade de cana geneticamente modificada para produção de açúcar. In: ENCONTRO DE PESQUISA E INOVAÇÃO DA EMBRAPA AGROENERGIA, 6., 2020, Brasília, DF. Anais... Brasília, DF: Embrapa, 2020. p. 136-143. il.| Tipo: Artigo em Anais de Congresso |
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