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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
10/10/2002 |
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Data da última atualização: |
10/10/2002 |
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Autoria: |
HOSTE, H.; CHARTIER, C. |
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Título: |
Response to challenge infection with Haemonchus contortus and Trichostrongylus colubriformis in dairy goats: consequences on milk production. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Veterinary Parasitology, v. 74, n. 1, p. 43-54, 1998. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of the study was to examine the ability of dairy goats to develop a response to 1 nematode parasites of the digestive tract after a previous contact with the worms. One hundred , dairy goats were initially divided into 2 groups. One remained free of parasites (not previously infected: NPI). The second group was infected thrice at 50 days interval with a mixture of . Haemonchus contortus and Trichostrongylus colubriformis (previously infected: PI)o After this initial exposure to nematodes, the goats were drenched with fenbendazole to eliminate the worms and remained free of parasites for 2 months around kidding. One month after kidding, 24 lactating dairy goats from each initial group were challenged with a mixture of H. contortus and T. , colubriformis and parasitological, pathophysiological and milk production parameters were measured fortnightly to assess the effects of challenge infection and the response of the goats. No difference in parasite egg excretion was found between group NPI and PI after challenge infection. Similarly, no difference in worm counts was detected in 5 culled goats from each group killed one I month post challenge. In contrast, differences between both groups were detected when considering the pathophysiological parameters (packed cell volume, inorganic phosphate and pepsinogen concentrations) with consequences of infection being more severe in the previously infected animals. Moreover, the milk production was also depressed in the PI group when compared to the NPI Que. These results indicate that the response developed by adult dairy goats after the challenge infection was unable to limit the worm populations but could have pathophysiological repercussions and consequences on production. MenosThe objective of the study was to examine the ability of dairy goats to develop a response to 1 nematode parasites of the digestive tract after a previous contact with the worms. One hundred , dairy goats were initially divided into 2 groups. One remained free of parasites (not previously infected: NPI). The second group was infected thrice at 50 days interval with a mixture of . Haemonchus contortus and Trichostrongylus colubriformis (previously infected: PI)o After this initial exposure to nematodes, the goats were drenched with fenbendazole to eliminate the worms and remained free of parasites for 2 months around kidding. One month after kidding, 24 lactating dairy goats from each initial group were challenged with a mixture of H. contortus and T. , colubriformis and parasitological, pathophysiological and milk production parameters were measured fortnightly to assess the effects of challenge infection and the response of the goats. No difference in parasite egg excretion was found between group NPI and PI after challenge infection. Similarly, no difference in worm counts was detected in 5 culled goats from each group killed one I month post challenge. In contrast, differences between both groups were detected when considering the pathophysiological parameters (packed cell volume, inorganic phosphate and pepsinogen concentrations) with consequences of infection being more severe in the previously infected animals. Moreover, the milk production was also depressed in the PI... Mostrar Tudo |
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Palavras-Chave: |
Nematódeo gastrintestinal. |
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Thesagro: |
Caprino; Doença Animal; Haemonchus Contortus; Leite; Produção; Resistência. |
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Thesaurus Nal: |
Trichostrongylus colubriformis. |
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Categoria do assunto: |
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Marc: |
LEADER 02461naa a2200229 a 4500
001 1528662
005 2002-10-10
008 1998 bl uuuu u00u1 u #d
100 1 $aHOSTE, H.
245 $aResponse to challenge infection with Haemonchus contortus and Trichostrongylus colubriformis in dairy goats$bconsequences on milk production.
260 $c1998
520 $aThe objective of the study was to examine the ability of dairy goats to develop a response to 1 nematode parasites of the digestive tract after a previous contact with the worms. One hundred , dairy goats were initially divided into 2 groups. One remained free of parasites (not previously infected: NPI). The second group was infected thrice at 50 days interval with a mixture of . Haemonchus contortus and Trichostrongylus colubriformis (previously infected: PI)o After this initial exposure to nematodes, the goats were drenched with fenbendazole to eliminate the worms and remained free of parasites for 2 months around kidding. One month after kidding, 24 lactating dairy goats from each initial group were challenged with a mixture of H. contortus and T. , colubriformis and parasitological, pathophysiological and milk production parameters were measured fortnightly to assess the effects of challenge infection and the response of the goats. No difference in parasite egg excretion was found between group NPI and PI after challenge infection. Similarly, no difference in worm counts was detected in 5 culled goats from each group killed one I month post challenge. In contrast, differences between both groups were detected when considering the pathophysiological parameters (packed cell volume, inorganic phosphate and pepsinogen concentrations) with consequences of infection being more severe in the previously infected animals. Moreover, the milk production was also depressed in the PI group when compared to the NPI Que. These results indicate that the response developed by adult dairy goats after the challenge infection was unable to limit the worm populations but could have pathophysiological repercussions and consequences on production.
650 $aTrichostrongylus colubriformis
650 $aCaprino
650 $aDoença Animal
650 $aHaemonchus Contortus
650 $aLeite
650 $aProdução
650 $aResistência
653 $aNematódeo gastrintestinal
700 1 $aCHARTIER, C.
773 $tVeterinary Parasitology$gv. 74, n. 1, p. 43-54, 1998.
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Embrapa Caprinos e Ovinos (CNPC) |
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