989 resultados para LIGHT MICROSCOPY


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Angiostrongylus cantonensis is the etiologic agent of eosinophilic meningoencephalitis in humans. Cases have been recorded in many parts of the world, including Brazil. The aim of this study was to compare the differences in the biology and morphology of two different Brazilian haplotypes of A. : ac8 and ac9. A significantly larger number of L1 larvae eliminated in the faeces of rodents at the beginning of the patent period was observed for ac9 haplotype and compared to the total of L1 larvae eliminated, there was a significant difference between the two haplotypes. The ac9 haplotype showed a significant difference in the proportion of female and male specimens (0.6:1), but the same was not observed for ac8 (1.2:1). The morphometric analysis showed that male and female specimens isolated from ac8 haplotype were significantly larger with respect to body length, oesophagus length, spicule length (male) and distance from the anus to the rear end (female) compared to specimens from ac9. The morphological analysis by light microscopy showed little variation in the level of bifurcations at the lateral rays in the right lobe of the copulatory bursa between the two haplotypes. The biological, morphological and morphometric variations observed between the two haplotypes agree with the observed variation at the molecular level using the cytochrome oxidase subunit I marker and reinforce the possible influence of geographical isolation on the development of these haplotypes.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Ginecologia, Obstetrícia e Mastologia - FMB

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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In this study, biomembrane of natural latex was utilized to replace a section of the stomach wall of New Zealand rabbits, adult and non-castrated males (n=12), in order to evaluate the tissue repair process in regards to its biocompatility, scar formation ability and possible complications. The animals were euthanized at fifteen, 30 and 60 days post operation, by use of sodium thiopental (200mg kg-1), followed by macroscopic and histopathological analysis of the implant interface with the native tissue. Macroscopically, at fifteen, 30, and 60 days post operation adherence was observed in the serosal wall. At 60 days post operation, the biomembrane is not in the stomach. Under light microscopy, at fifteen and 30 days, discontinuity of muscle layer and mucosa layer, and presence of polimorfonuclear population of inflammatory cells was observed. New vessels and muscle fibers were observed. At 60 days, the mucosa and muscle layers were complete reconstituted. The implants were biocompatible and had provided the mainframe for orientation and development of the tissue layers through repairing processes, thus reestablishing the organ structure.

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Pós-graduação em Ciência e Tecnologia Animal - FEIS

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Pós-graduação em Ciências Biológicas (Botânica) - IBB

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)