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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

Identificação de microrganismos cultiváveis associados ao intestino de Anopheles darlingi (Diptera: Culicidae) com potencial à paratransgênese para o controle da malária

Arruda, Andrelisse, 69-99901-2574 30 October 2017 (has links)
Submitted by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2018-05-11T14:59:51Z No. of bitstreams: 2 Tese_Andrelisse Arruda_2017.pdf: 5916961 bytes, checksum: d3d6f3dd277d94f02ba45cb40e90dc81 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2018-05-11T15:00:15Z (GMT) No. of bitstreams: 2 Tese_Andrelisse Arruda_2017.pdf: 5916961 bytes, checksum: d3d6f3dd277d94f02ba45cb40e90dc81 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-05-11T15:00:15Z (GMT). No. of bitstreams: 2 Tese_Andrelisse Arruda_2017.pdf: 5916961 bytes, checksum: d3d6f3dd277d94f02ba45cb40e90dc81 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-10-30 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Microrganisms living in insects’ midgut have been isolated and identified for developing biotechnological tools to fight vector-born diseases. In this context, the mosquitoes Anopheles from different regions around the world have been studied about their midgut microbiota focused on paratransgenesis. However, information about microrganisms living in neotropical mosquitoes midgut are scarce. And, specially about Anopheles darlingi, the main malaria vector in the Brazilian Amazon, still this study, there were not any report about culturable microrganisms associated to this insect. The first step for paratransgenesis is to isolate culturable microrganisms naturally associated to the insect vector, and thus amenable to experimentation in laboratory. The objectives of this work were to isolate and to identify culturable bacteria and yeasts isolated from feces of Anopheles darlingi, the main vector of malaria in Brazil; to estimate the species richness and frequency distribution of the sampled bacteria and yeasts and to characterize and to select the sampled bacteria and yeasts isolated from feces of An. darlingi with potential for paratransgenesis. The female mosquitoes of An.darlingi were captured in two rural places of Porto Velho, Rondônia, Brasil. For improving the bacterial growth, mosquito feces were collected on LB agar medium and cultivated at 37 ºC for 24 hours, and for improving the yeast growth, mosquito feces were collected on YPD agar medium with Chloramphenicol and cultivated at 30 ºC for 48 hours. Sixty pure bacteria colonies and sixty pure yeast colonies were sampled. The isolates were preserved in -80 ºC freezer. PCR reactions with genomic DNA from each isolate were perfomed using the primers of 16S rRNA genes for bacteria and 26S and ITS for yeasts. From 60 bacterial isolates, 55 samples were identified. From 60 yeast isolates, 27 samples were identified. The fragments were sequenced with the Sanger method and the sequences with similarities above of 97% with sequences in reference database were deposited in Genbank (NCBI). For bacteria, MALDI-TOF, VITEK®2 and BBL Crystal were also used as a complementar protocols to identify the isolates. The identified bacteria fall into 8 genera, Enterobacter, Klebsiella, Cedecea, Pantoea, Serratia, Acinetobacter, Burkholderia and Staphylococcus. The identified yeast fall into 7 genera, Pseudozyma, Papiliotrema (Cryptococcus), Meyerozyma (=Pichia), Rhodotorula, Candida, Hanseniaspora and Metschnikowia. As candidates to paratransgenesis to control of malaria in An. darlingi are those bacteria belonging to the genera Pantoea and Serratia and the yeasts belonging to the genera Meyerozyma (=Pichia), Pseudozyma, Hanseniaspora and Metschnikowia. / Microrganismos contidos no trato digestório de insetos vem sendo isolados e identificados com o intuito de desenvolver ferramentas biotecnológicas para o controle de doenças transmitidas por insetos. Nesse contexto, mosquitos Anopheles de diferentes partes do globo têm sua microbiota investigada com foco em paratransgênese. No entanto, a informação sobre microrganismos associados aos anofelinos neotropicais é escassa. Tratando-se de Anopheles darlingi, o principal vetor de malária no Brasil, até o presente trabalho, não havia informações sobre microrganismos cultiváveis associados a esse vetor. Os objetivos deste trabalho foram isolar e identificar bactérias e leveduras cultiváveis isoladas das fezes de An. darlingi, o principal vetor da malária no Brasil; estimar riqueza e distribuição de frequência das bactérias e leveduras amostradas, e caracterizar e selecionar bactérias e leveduras isoladas das fezes de An. darlingi com potencial para paratransgênese. Os mosquitos An. darlingi fêmeas foram coletados em duas localidades rurais de Porto Velho, Rondônia, Brasil. Para favorecer o crescimento de bactérias, fezes dos mosquitos foram coletadas em meio LB ágar e cultivadas à 37°C por 24 horas, e para propiciar o crescimento de leveduras, fezes dos mosquitos foram coletadas em meio YPD ágar com cloranfenicol e cultivadas à 30°C por 48 horas. Sessenta colônias bacterianas e 60 colônias leveduriformes foram amostradas. Os isolados foram preservados em freezer -80 °C. Foram realizadas PCR utilizado DNA genômico dos isolados com iniciadores para a região do DNA ribossomal 16S para bactérias e 26S e ITS para leveduras. Todas as 60 bactérias isoladas foram identificadas. Das 60 leveduras isoladas, 27 foram identificadas. Os fragmentos foram sequenciados pelo método Sanger e as sequências com similaridades superiores a 97% frente a sequências disponíveis em bancos de dados foram depositadas no GenBank. Para bactérias, MALDI-TOF, VITEK®2 e BBL Crystal foram utilizados como métodos complementares para identificação dos isolados. As bactérias identificadas pertencem a 8 gêneros: Staphylococcus, Burkholderia, Cedecea, Enterobacter, Klebsiella, Pantoea, Serratia e Acinetobacter. As leveduras identificadas pertencem a 7 gêneros: Candida, Meyerozyma (=Pichia), Metschnikowia, Hanseniaspora, Rhodotorula, Papiliotrema (=Cryptococcus) e Pseudozyma. São candidatas à paratransgênese para o controle da malária em An. darlingi as bactérias do gênero Pantoea e Serratia e as leveduras dos gêneros Meyerozyma (Pichia), Metschkowia, Hanseniaspora e Pseudozyma.

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