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Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
25/01/1999 |
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Data da última atualização: |
30/03/2017 |
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Autoria: |
CATTO, J. B. |
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Afiliação: |
EMBRAPA. Centro de Pesquisa Agropecuaria do Pantanal (Corumba, MS). |
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Título: |
Survival of cattle gastrointestinal nematode infective larvae in the Pantanal Regions, Mato Grosso do Sul, Brazil. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
In: CONFERENCE OF WORLD ASSOCIATION FOR THE ADVANCEMENT OF VETERINARY PARASITOLOGY, 11., 1985, Rio de Janeiro. Abstracts. Veterinary Parasitology, 1985. p.42. Resumos 186. |
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Idioma: |
Inglês |
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Conteúdo: |
The survival of the infective larvae of cattle parasites in the Pantanal region was studied during two years throught montly deposition of faecal pats on the pasture and periodic examinations of them and of the foliage around them. It was observed that the faecal pats set down during the drt season (May to September) and the pasture around them remained positive to infective larvae for an average of 4.6 and 4.3 months, respectively; during the wet season (October to April) remained positive for an average of 2.4 and 1.9 months, respectively. The liberation of the larvae from the pats to the pasture showed a positive correlation with the frequency and intensity of the rains. During the dry season the faecal pats formed a crust which inibited the larvae migration but also provided survival conditions for the larvae within the pats. During the wet season due to more frequent and intense rains and due to dung bettle action (Coleoptera), the faecal pats did not form crust, leading to a prompt liberation of larvae. Once in environment, the larvae had their survival shortened by the action of the sun, extremely sandy soil, poor vegetal cover of the soil and hight temperatures. Larval identification in the coprocultures, faecal pats, and pasture showed that: Cooperia spp. represented, respectively, 74.1, 92.4 and 90.2%; Haemonchus spp. 17.1, 3.2 and 3.3%; and Oesophagos tomum radiatum 8.5, 4.4 and 6.5%. This demonstrated the better conditions of the larvae of the genus Cooperia to survive in the open environment. It is concluded that a pasture resting period of two months, from November to february, may drasticaly reduce infective larval population. MenosThe survival of the infective larvae of cattle parasites in the Pantanal region was studied during two years throught montly deposition of faecal pats on the pasture and periodic examinations of them and of the foliage around them. It was observed that the faecal pats set down during the drt season (May to September) and the pasture around them remained positive to infective larvae for an average of 4.6 and 4.3 months, respectively; during the wet season (October to April) remained positive for an average of 2.4 and 1.9 months, respectively. The liberation of the larvae from the pats to the pasture showed a positive correlation with the frequency and intensity of the rains. During the dry season the faecal pats formed a crust which inibited the larvae migration but also provided survival conditions for the larvae within the pats. During the wet season due to more frequent and intense rains and due to dung bettle action (Coleoptera), the faecal pats did not form crust, leading to a prompt liberation of larvae. Once in environment, the larvae had their survival shortened by the action of the sun, extremely sandy soil, poor vegetal cover of the soil and hight temperatures. Larval identification in the coprocultures, faecal pats, and pasture showed that: Cooperia spp. represented, respectively, 74.1, 92.4 and 90.2%; Haemonchus spp. 17.1, 3.2 and 3.3%; and Oesophagos tomum radiatum 8.5, 4.4 and 6.5%. This demonstrated the better conditions of the larvae of the genus Cooperia to s... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Nematode; Parasita; Parasite. |
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Thesagro: |
Gado; Larva. |
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Thesaurus NAL: |
Brazil; cattle; larvae; Pantanal. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02412naa a2200241 a 4500
001 1793380
005 2017-03-30
008 1985 bl --- 0-- u #d
100 1 $aCATTO, J. B.
245 $aSurvival of cattle gastrointestinal nematode infective larvae in the Pantanal Regions, Mato Grosso do Sul, Brazil.
260 $c1985
520 $aThe survival of the infective larvae of cattle parasites in the Pantanal region was studied during two years throught montly deposition of faecal pats on the pasture and periodic examinations of them and of the foliage around them. It was observed that the faecal pats set down during the drt season (May to September) and the pasture around them remained positive to infective larvae for an average of 4.6 and 4.3 months, respectively; during the wet season (October to April) remained positive for an average of 2.4 and 1.9 months, respectively. The liberation of the larvae from the pats to the pasture showed a positive correlation with the frequency and intensity of the rains. During the dry season the faecal pats formed a crust which inibited the larvae migration but also provided survival conditions for the larvae within the pats. During the wet season due to more frequent and intense rains and due to dung bettle action (Coleoptera), the faecal pats did not form crust, leading to a prompt liberation of larvae. Once in environment, the larvae had their survival shortened by the action of the sun, extremely sandy soil, poor vegetal cover of the soil and hight temperatures. Larval identification in the coprocultures, faecal pats, and pasture showed that: Cooperia spp. represented, respectively, 74.1, 92.4 and 90.2%; Haemonchus spp. 17.1, 3.2 and 3.3%; and Oesophagos tomum radiatum 8.5, 4.4 and 6.5%. This demonstrated the better conditions of the larvae of the genus Cooperia to survive in the open environment. It is concluded that a pasture resting period of two months, from November to february, may drasticaly reduce infective larval population.
650 $aBrazil
650 $acattle
650 $alarvae
650 $aPantanal
650 $aGado
650 $aLarva
653 $aBrasil
653 $aNematode
653 $aParasita
653 $aParasite
773 $tIn: CONFERENCE OF WORLD ASSOCIATION FOR THE ADVANCEMENT OF VETERINARY PARASITOLOGY, 11., 1985, Rio de Janeiro. Abstracts. Veterinary Parasitology, 1985. p.42. Resumos 186.
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