Data/hora: 21/06/2024 18:09:50

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 11/09/1997
Data da última atualização: | 12/01/2009
Autoria: | DAVILA, A. M. R.; RAMIREZ, L.; SILVA, R. A. M. S.
Afiliação: | EMBRAPA. Centro de Pesquisa Agropecuaria do Pantanal (Corumba, MS).
Título: | Variations in biometrical data of a Trypanosoma evansi isolate in laboratory rodents.
Ano de publicação: | 1996
Fonte/Imprenta: | Memorias do Instituto Oswaldo Cruz, Rio de Janeiro, v.91, p.107, 1996. Suplemento.
Idioma: | Inglês
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.
Thesaurus Nal: | Trypanosoma evansi.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (34848-1) - UPC - AP - -- - AP614.405 -  - 614.405 - DIS