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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Caracterização histológica de vermes adultos machos de Lagochilascaris minor / Histological characterization of adult males worms of Lagochilascaris minor

Vieira, Ana Paula de Toledo 27 February 2012 (has links)
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2014-11-24T13:11:26Z No. of bitstreams: 2 Dissertação - Ana Paula de Toledo Vieira - 2012.pdf: 10699833 bytes, checksum: 2e25915716db787ecacbd31491c5309a (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2014-11-24T14:02:12Z (GMT) No. of bitstreams: 2 Dissertação - Ana Paula de Toledo Vieira - 2012.pdf: 10699833 bytes, checksum: 2e25915716db787ecacbd31491c5309a (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2014-11-24T14:02:12Z (GMT). No. of bitstreams: 2 Dissertação - Ana Paula de Toledo Vieira - 2012.pdf: 10699833 bytes, checksum: 2e25915716db787ecacbd31491c5309a (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2012-02-27 / Fundação de Amparo à Pesquisa do Estado de Goiás - FAPEG / Nematoda Lagochilascaris minor is the etiologic agent of lagochilascaríase in human beings. Until today, no one knows the natural host of this helminth and Brazil registers about 90% of the cases of lagochilascaríase world-wide human being. The life cycle of L. minor was described using an experimental model in mice and domestic cat, behaving as an intermediate host and definitive host respectively. The objective of this study was to evaluate the histology of the adult males of this helminth worms, using light microscopy. These specimens were removed after necropsy of cats kept in their cages cataloged in male and female worms, and the adult male specimens were fixed in formalin solution 10 % hot, AFA and 4% paraformaldehyde in sodium cacodylate buffer 0 1 M, pH 7.2. After the different fixations, the samples were dehydrated in a gradual series of ethanol in different concentrations of alcohol levels, and included in historesin cut with 3μm –thick microtome, with horizontal and transverse serial sections. The sections were stained with Hematoxylin & Eosin (HE), Carmin, Giemsa and Toluidine Blue. The best fixation was achieved with the use of AFA and 4% paraformaldehyde in 0.1 M sodium cacodylate buffer pH 7.2 and the best staining was obtained from the use of the dye HE, which showed histological structures of adult male worms L. minor loop as testicular, seminal vesicle, ejaculatory duct, sperm and spicule. It was also observed structures of the digestive system, muscular system, cuticle, wing side and lateral line. The sections were photomicrographed using photomicroscope with the help of the program Motic Images Plus 2.0, selected and analyzed. / O nematoda Lagochilascaris minor é o agente etiológico da lagochilascaríase em humanos. Até hoje, não se conhece o hospedeiro natural deste helminto e o Brasil registra cerca de 90% dos casos da lagochilascaríase humana mundial. O ciclo evolutivo de L. minor foi descrito utilizando um modelo experimental com camundongo e gato doméstico, comportando-se como hospedeiro intermediário e hospedeiro definitivo, respectivamente. O objetivo deste trabalho foi avaliar a histologia dos vermes adultos machos deste helminto, utilizando microscopia de luz. Estes exemplares foram retirados após necropsia de gatos mantidos em biotério, catalogados em vermes machos e fêmeas, sendo que os exemplares machos adultos foram fixados em solução de Formalina a 10% a quente, AFA e Paraformaldeído a 4% em tampão cacodilato de sódio 0,1 M pH 7,2. Após as diferentes fixações, as amostras foram desidratadas em uma série gradual de etanol em diferentes concentrações de teores alcoólicos, incluídas em historesina e cortadas com 3μm de espessura em micrótomo, com secções seriadas horizontais e transversais. Os cortes foram corados com Hematoxilina & Eosina (HE), Carmim, Giemsa e Azul de Toluidina. A melhores fixações foram alcançadas com o uso de AFA e Paraformaldeído a 4% em tampão cacodilato sódio 0,1 M pH 7,2 e a melhor coloração obteve-se a partir da utilização do corante HE, que evidenciou estruturas histológicas dos vermes adultos machos de L. minor como alça testicular, vesícula seminal, ducto ejaculatório, espermatozoides e espículo. Observou-se também estruturas do sistema digestório, sistema muscular, cutícula, asa lateral e linha lateral. As imagens dos cortes foram realizadas utilizando um fotomicroscópio com o auxílio do programa Motic Images Plus 2.0, selecionadas e analisadas.

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