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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
11/09/1997 |
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Data da última atualização: |
12/01/2009 |
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Autoria: |
DAVILA, A. M. R.; RAMIREZ, L.; SILVA, R. A. M. S. |
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Afiliação: |
EMBRAPA. Centro de Pesquisa Agropecuaria do Pantanal (Corumba, MS). |
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Título: |
Variations in biometrical data of a Trypanosoma evansi isolate in laboratory rodents. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Memorias do Instituto Oswaldo Cruz, Rio de Janeiro, v.91, p.107, 1996. Suplemento. |
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Idioma: |
Inglês |
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Conteúdo: |
An important turning point in the appreciation of parasite variability has been those studies on the ecology and epidemiology of parasites and parasitic diseases that have found marked differences in morphologic aspects of parasites. There are some reports on form-function relationship,with morphology representing a marker of peculia physiologic, biochemical and pathogenic behaviours. This study recorded some biometrical alterations from a horse isolate during sucessive syringe passages in laboratory rodents. The measural data of the primary isolate and passages number 10, 15, 50 and 180 were made in 100, 50, 50 and 50 observations from thin smears respectively. The data were analysed statistically using a T-test. The results were organized in the groups: (a) comparison between primary isolate and passage 10 in rodents. (b) comparison between passages into rodent host. (c) comparison between passages 10 and 180 in the rodent host. In the group (a) was observed a highly significant increase in PN, NA, F, T and PN/NA (P<0.0001). In the group (b) a statistically significant reduction in PN was not observed from passages 10 to 15 and 15 to 50. The reduction in NA, T and PN/NA measurements from passage 10 to 15 was highly significant (P<0.0001). NA, F, L and PN/NA increase was highly significant from passage 15 to 50. A statistically significant reduction in PN was observed from passage 50 to 180. In the group (c) a highly significant reduction in PN and NA was observed from passage 10 to 180. A highly significant reduction in T and a highly significant increase in PN/NA was observed. The data revealed that biometrical variations occurred in NA, F, T and PN/NA parasites regions into host rodent. The only significant in PN was from passage 50 to 180. The major transformations observed were the increase of PN, NA, F and T regions as well as the reduction of PN/NA. These transformations probably occurred as consequence of host change (horse to rodents). Finally, other morphological alteration observed was a gradual increase of ondulating membrane in stumpy forms into rodent host. Occurrence of this stumpy forms were occasionally observed between the predominant slender intermediate forms. MenosAn important turning point in the appreciation of parasite variability has been those studies on the ecology and epidemiology of parasites and parasitic diseases that have found marked differences in morphologic aspects of parasites. There are some reports on form-function relationship,with morphology representing a marker of peculia physiologic, biochemical and pathogenic behaviours. This study recorded some biometrical alterations from a horse isolate during sucessive syringe passages in laboratory rodents. The measural data of the primary isolate and passages number 10, 15, 50 and 180 were made in 100, 50, 50 and 50 observations from thin smears respectively. The data were analysed statistically using a T-test. The results were organized in the groups: (a) comparison between primary isolate and passage 10 in rodents. (b) comparison between passages into rodent host. (c) comparison between passages 10 and 180 in the rodent host. In the group (a) was observed a highly significant increase in PN, NA, F, T and PN/NA (P<0.0001). In the group (b) a statistically significant reduction in PN was not observed from passages 10 to 15 and 15 to 50. The reduction in NA, T and PN/NA measurements from passage 10 to 15 was highly significant (P<0.0001). NA, F, L and PN/NA increase was highly significant from passage 15 to 50. A statistically significant reduction in PN was observed from passage 50 to 180. In the group (c) a highly significant reduction in PN and NA was observed from pass... Mostrar Tudo |
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Thesaurus Nal: |
Trypanosoma evansi. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02715naa a2200157 a 4500
001 1791633
005 2009-01-12
008 1996 bl uuuu u00u1 u #d
100 1 $aDAVILA, A. M. R.
245 $aVariations in biometrical data of a Trypanosoma evansi isolate in laboratory rodents.
260 $c1996
520 $aAn important turning point in the appreciation of parasite variability has been those studies on the ecology and epidemiology of parasites and parasitic diseases that have found marked differences in morphologic aspects of parasites. There are some reports on form-function relationship,with morphology representing a marker of peculia physiologic, biochemical and pathogenic behaviours. This study recorded some biometrical alterations from a horse isolate during sucessive syringe passages in laboratory rodents. The measural data of the primary isolate and passages number 10, 15, 50 and 180 were made in 100, 50, 50 and 50 observations from thin smears respectively. The data were analysed statistically using a T-test. The results were organized in the groups: (a) comparison between primary isolate and passage 10 in rodents. (b) comparison between passages into rodent host. (c) comparison between passages 10 and 180 in the rodent host. In the group (a) was observed a highly significant increase in PN, NA, F, T and PN/NA (P<0.0001). In the group (b) a statistically significant reduction in PN was not observed from passages 10 to 15 and 15 to 50. The reduction in NA, T and PN/NA measurements from passage 10 to 15 was highly significant (P<0.0001). NA, F, L and PN/NA increase was highly significant from passage 15 to 50. A statistically significant reduction in PN was observed from passage 50 to 180. In the group (c) a highly significant reduction in PN and NA was observed from passage 10 to 180. A highly significant reduction in T and a highly significant increase in PN/NA was observed. The data revealed that biometrical variations occurred in NA, F, T and PN/NA parasites regions into host rodent. The only significant in PN was from passage 50 to 180. The major transformations observed were the increase of PN, NA, F and T regions as well as the reduction of PN/NA. These transformations probably occurred as consequence of host change (horse to rodents). Finally, other morphological alteration observed was a gradual increase of ondulating membrane in stumpy forms into rodent host. Occurrence of this stumpy forms were occasionally observed between the predominant slender intermediate forms.
650 $aTrypanosoma evansi
700 1 $aRAMIREZ, L.
700 1 $aSILVA, R. A. M. S.
773 $tMemorias do Instituto Oswaldo Cruz, Rio de Janeiro$gv.91, p.107, 1996. Suplemento.
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pantanal. Para informações adicionais entre em contato com cpap.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
18/02/2015 |
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Data da última atualização: |
29/01/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
OLIVEIRA, N. M. de; REZENDE, M. P. G. de; ABREU, U. G. P. de; ROSA, A. do N.; STERZA, F. de A. M.; LEÃO FIALHO, A. L. |
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Afiliação: |
NICÁCIA MONTEIRO DE OLIVEIRA, UEMS; MARCOS PAULO GONÇALVES DE REZENDE, UEMS; URBANO GOMES PINTO DE ABREU, CPAP; ANTONIO DO NASCIMENTO ROSA, CNPGC; FABIANA DE ANDRADE MELO STERZA, UEMS; ANDRÉ LUIZ LEÃO FIALHO, UEMS. |
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Título: |
Environmental effects on reproductive performance of Nellore cows widely raised in the Cerrado/Pantanal ecotone. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Acta Scientiarum. Animal Sciences, Maringá, v. 37, n. 1, p. 77-82, jan.-mar., 2015. |
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ISSN: |
1806-8672 |
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Idioma: |
Inglês |
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Conteúdo: |
We analyzed the pregnancy rate (PR) and birth rate (BR) of Nellore cows raised extensively in the Cerrado/Pantanal during 4 mating seasons (2009?2012), assessing the relationship with the temperature and humidity index (THI) and the effect of the year and breeding season. We used information from 2,116 cows, which were categorized as either multiparous (n = 1430), primiparous (n = 338), or nulliparous (n = 348). In the months of the breeding season (December?February), temperature and relative humidity data were collected to calculate the temperature and humidity index (THI). An ANOVA was performed with a model that included sources of variation from the fixed effects of category of cow and year on PR and BR; and a linear regression analysis and correlation between THI and PR and BR. We observed a significant effect (p < 0.05) on PR. We classified the average across breeding seasons as a moderate THI. The THI of the breeding seasons showed high and significant (p < 0.05) effects only on the nulliparous BR, and low values in other categories. It is concluded that the seasonal THI was not related to the performance of cows, except BR in nulliparous cows. |
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Palavras-Chave: |
Bovino de corte; Efeito ambiental; Environmental effect. |
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Thesagro: |
Eficiência Reprodutiva; Gado nelore; Matriz; Prenhez; Reprodução animal. |
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Thesaurus NAL: |
beef cattle; reproductive efficiency. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02121naa a2200313 a 4500
001 2008910
005 2016-01-29
008 2015 bl uuuu u00u1 u #d
022 $a1806-8672
100 1 $aOLIVEIRA, N. M. de
245 $aEnvironmental effects on reproductive performance of Nellore cows widely raised in the Cerrado/Pantanal ecotone.
260 $c2015
520 $aWe analyzed the pregnancy rate (PR) and birth rate (BR) of Nellore cows raised extensively in the Cerrado/Pantanal during 4 mating seasons (2009?2012), assessing the relationship with the temperature and humidity index (THI) and the effect of the year and breeding season. We used information from 2,116 cows, which were categorized as either multiparous (n = 1430), primiparous (n = 338), or nulliparous (n = 348). In the months of the breeding season (December?February), temperature and relative humidity data were collected to calculate the temperature and humidity index (THI). An ANOVA was performed with a model that included sources of variation from the fixed effects of category of cow and year on PR and BR; and a linear regression analysis and correlation between THI and PR and BR. We observed a significant effect (p < 0.05) on PR. We classified the average across breeding seasons as a moderate THI. The THI of the breeding seasons showed high and significant (p < 0.05) effects only on the nulliparous BR, and low values in other categories. It is concluded that the seasonal THI was not related to the performance of cows, except BR in nulliparous cows.
650 $abeef cattle
650 $areproductive efficiency
650 $aEficiência Reprodutiva
650 $aGado nelore
650 $aMatriz
650 $aPrenhez
650 $aReprodução animal
653 $aBovino de corte
653 $aEfeito ambiental
653 $aEnvironmental effect
700 1 $aREZENDE, M. P. G. de
700 1 $aABREU, U. G. P. de
700 1 $aROSA, A. do N.
700 1 $aSTERZA, F. de A. M.
700 1 $aLEÃO FIALHO, A. L.
773 $tActa Scientiarum. Animal Sciences, Maringá$gv. 37, n. 1, p. 77-82, jan.-mar., 2015.
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