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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
14/03/2000 |
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Data da última atualização: |
24/07/2023 |
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Autoria: |
CHARTIER, C.; HOSTE, H. |
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Título: |
Repeated infections with Haemonchus contortus and Trichostrongylus colubriformis in dairy goats: comparison of resistant and susceptible animals. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Parasitology Research, v. 84, n. 3, p. 249-253, 1998. |
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DOI: |
10.1007/s004360050390. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: A total of 70 strongyle-free French Alpine dairy goats were exposed to a combination of sequential and challenge infections with Haemonchus contortus and Trichostrongylus colubriformis third-stage larvae. The sequential infection consisted of three inoculations at 50-day intervals, each infection being abbreviated by anthelmintic treatment at 40 days postinoculation. The challenge infection, composed of the same nematode strains, was undertaken 2 months later, when goats were at their 1st month of lactation. Fecal egg counts (FECs), packed cell volumes (PCVs), pepsinogen concentrations, inorganic phosphate concentrations, and peripheral eosinophil numbers were measured at 30?40 days after each inoculation. Goats were defined as being resistant or susceptible according to their level of nematode egg output following the first inoculation. Significant differences in FECs were recorded between the two groups throughout the further inoculations and the challenge infection. The reliability of FECs was supported by the high repeatability values found within and between infections. With regard to blood constituents, only PCVs related to H. contortus infection showed values that differed significantly between the two groups, resistant goats having higher PCVs after the first and the third inoculations than did susceptible animals. However, this difference was not detectable after the challenge infection. The milk production yield for the current lactation was significantly lower in the resistant goats. Moreover, resistant animals exhibited constantly greater body condition scores as compared with susceptible animals. These results indicate that the individual responsiveness of dairy goats to experimental nematode infection can be estimated on the basis of FECs and PCVs (for H. contortus) and is negatively related to the level of milk production of the animals. MenosAbstract: A total of 70 strongyle-free French Alpine dairy goats were exposed to a combination of sequential and challenge infections with Haemonchus contortus and Trichostrongylus colubriformis third-stage larvae. The sequential infection consisted of three inoculations at 50-day intervals, each infection being abbreviated by anthelmintic treatment at 40 days postinoculation. The challenge infection, composed of the same nematode strains, was undertaken 2 months later, when goats were at their 1st month of lactation. Fecal egg counts (FECs), packed cell volumes (PCVs), pepsinogen concentrations, inorganic phosphate concentrations, and peripheral eosinophil numbers were measured at 30?40 days after each inoculation. Goats were defined as being resistant or susceptible according to their level of nematode egg output following the first inoculation. Significant differences in FECs were recorded between the two groups throughout the further inoculations and the challenge infection. The reliability of FECs was supported by the high repeatability values found within and between infections. With regard to blood constituents, only PCVs related to H. contortus infection showed values that differed significantly between the two groups, resistant goats having higher PCVs after the first and the third inoculations than did susceptible animals. However, this difference was not detectable after the challenge infection. The milk production yield for the current lactation was significantly... Mostrar Tudo |
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Palavras-Chave: |
Controle; Disease susceptibility; Host-Parasite Interactions; Nematodeo gastrintestinal. |
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Thesagro: |
Caprino; Resistência Genética. |
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Thesaurus Nal: |
Analysis of variance; Eosinophilia; Females; Gastrointestinal nematodes; Genetic resistance; Goat diseases; Goats; Helminthiasis; Parasitology; Trichostrongylus. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02932naa a2200337 a 4500
001 1524097
005 2023-07-24
008 1998 bl uuuu u00u1 u #d
024 7 $a10.1007/s004360050390.$2DOI
100 1 $aCHARTIER, C.
245 $aRepeated infections with Haemonchus contortus and Trichostrongylus colubriformis in dairy goats$bcomparison of resistant and susceptible animals.$h[electronic resource]
260 $c1998
520 $aAbstract: A total of 70 strongyle-free French Alpine dairy goats were exposed to a combination of sequential and challenge infections with Haemonchus contortus and Trichostrongylus colubriformis third-stage larvae. The sequential infection consisted of three inoculations at 50-day intervals, each infection being abbreviated by anthelmintic treatment at 40 days postinoculation. The challenge infection, composed of the same nematode strains, was undertaken 2 months later, when goats were at their 1st month of lactation. Fecal egg counts (FECs), packed cell volumes (PCVs), pepsinogen concentrations, inorganic phosphate concentrations, and peripheral eosinophil numbers were measured at 30?40 days after each inoculation. Goats were defined as being resistant or susceptible according to their level of nematode egg output following the first inoculation. Significant differences in FECs were recorded between the two groups throughout the further inoculations and the challenge infection. The reliability of FECs was supported by the high repeatability values found within and between infections. With regard to blood constituents, only PCVs related to H. contortus infection showed values that differed significantly between the two groups, resistant goats having higher PCVs after the first and the third inoculations than did susceptible animals. However, this difference was not detectable after the challenge infection. The milk production yield for the current lactation was significantly lower in the resistant goats. Moreover, resistant animals exhibited constantly greater body condition scores as compared with susceptible animals. These results indicate that the individual responsiveness of dairy goats to experimental nematode infection can be estimated on the basis of FECs and PCVs (for H. contortus) and is negatively related to the level of milk production of the animals.
650 $aAnalysis of variance
650 $aEosinophilia
650 $aFemales
650 $aGastrointestinal nematodes
650 $aGenetic resistance
650 $aGoat diseases
650 $aGoats
650 $aHelminthiasis
650 $aParasitology
650 $aTrichostrongylus
650 $aCaprino
650 $aResistência Genética
653 $aControle
653 $aDisease susceptibility
653 $aHost-Parasite Interactions
653 $aNematodeo gastrintestinal
700 1 $aHOSTE, H.
773 $tParasitology Research$gv. 84, n. 3, p. 249-253, 1998.
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