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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
02/08/2023 |
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Autoria: |
GREGORY, M. W.; CATCHPOLE, J. |
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Título: |
Ovine coccidiosis: pathology of Eimeria ovinoidalis infection. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
International Journal for parasitology, v. 17, n. 6, p. 1099-1111, Aug. 1987. |
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DOI: |
10.1016/0020-7519(87)90162-7. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Doses of sporulated oocysts of Eimeria ovinoidalis ranging from 102 to 5 × 106 were given to 25 housed lambs aged between 5 and 13 weeks, most of which had been reared coccidia-free. Some had received an ?immunizing? dose 3?4 weeks earlier. Lambs were killed between 8 and 21 days after inoculation (DAI) and the tissues were examined histologically. Doses higher than 106 caused extensive loss of epithelial cells in the lower jejunum both from the surface and from the crypts at 10 DAI when first-generation meronts were mature. Doses of 103 oocysts or more caused diarrhoea from about 13 DAI in both first and second infections; this was associated with massive invasion of the caecal epithelium by second-generation meronts and gamonts. Destruction of crypt stem cells by these stages led to denudation of the caecal mucosa, resulting in haemorrhagic enteritis, dehydration and delayed healing or death. |
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Palavras-Chave: |
Eimeria ovinoidalis; Patologia. |
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Thesagro: |
Coccidiose; Ovino; Parasitologia. |
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Thesaurus Nal: |
Animal pathology; Coccidiosis; Diarrhea; Dysentery; Enteritis; Enteropathogens; Intestines; Lambs; Parasitology; Sheep diseases. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
null
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
