Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016
Ano de defesa: | 2019 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Católica de Brasília
|
Programa de Pós-Graduação: |
Programa Stricto Sensu em Ciências Genômicas e Biotecnologia
|
Departamento: |
Escola de Saúde e Medicina
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Resumo em Inglês: | The genus Staphylococcus has 36 species and several subspecies, being S. aureus, species of greater clinical interest. For even if it belongs to the human's microbiota, this microorganism, when it can penetrate the tissues due to trauma, injury or low immunity, can develop asymptomatic infections or even serious infections. The vast majority of strains of this genus have resistance against the most different types of antibiotics, which has become a concern from the clinical and control point of these bacteria. Methicillin-resistant strains are called MRSA and can become multi-resistant to other antibiotics, making treatment difficult and costly. The phenotypic and genotypic characterization of the strains is of paramount importance for the knowledge of resistance genes and pathogenicity molecules in order to aid the control as well as the cost of the treatment. In this work, 31 strains of Staphylococcus ssp. belonging to the bacterioteca of the Central Laboratory of Public Health of the Federal District. The phenotypic characterization was performed in a manual and automated way, being carried out tests for identification of the species through analysis of biochemical tests and characterization of resistance profile by antibiogram. The genotypic characterization was performed using molecular tests by multiplex PCR, where the presence of mecA and lukF/S genes was analyzed. For the strains whose result was positive for the mecA gene, the staphylococcal chromosome cassettes (SCCmec) were typed. The results of this study confirm the conclusions made by other authors, where they observed that MRSA strains in addition to being resistant to beta-lactams, showed resistance to other antibiotics (eg clindamycin, gentamicin, ciprofloxacin and sulfamethoxazole / trimethoprim). In this study, 72% of the mecA-positive strains (MRSA and SCN) were identified as SCCmec I or II, suggesting that these infections were contracted in the hospital environment, and 28% of MRSA strains were identified as SCCmec type IV, suggesting that such infections originate in the Community environment. The lukF / S gene was present in 3 samples, all containing the SCCmec IV, confirming the studies of several authors, reporting the production of PVL in strains of community origin. |
Link de acesso: | https://bdtd.ucb.br:8443/jspui/handle/tede/2562 |
Resumo: | The genus Staphylococcus has 36 species and several subspecies, being S. aureus, species of greater clinical interest. For even if it belongs to the human's microbiota, this microorganism, when it can penetrate the tissues due to trauma, injury or low immunity, can develop asymptomatic infections or even serious infections. The vast majority of strains of this genus have resistance against the most different types of antibiotics, which has become a concern from the clinical and control point of these bacteria. Methicillin-resistant strains are called MRSA and can become multi-resistant to other antibiotics, making treatment difficult and costly. The phenotypic and genotypic characterization of the strains is of paramount importance for the knowledge of resistance genes and pathogenicity molecules in order to aid the control as well as the cost of the treatment. In this work, 31 strains of Staphylococcus ssp. belonging to the bacterioteca of the Central Laboratory of Public Health of the Federal District. The phenotypic characterization was performed in a manual and automated way, being carried out tests for identification of the species through analysis of biochemical tests and characterization of resistance profile by antibiogram. The genotypic characterization was performed using molecular tests by multiplex PCR, where the presence of mecA and lukF/S genes was analyzed. For the strains whose result was positive for the mecA gene, the staphylococcal chromosome cassettes (SCCmec) were typed. The results of this study confirm the conclusions made by other authors, where they observed that MRSA strains in addition to being resistant to beta-lactams, showed resistance to other antibiotics (eg clindamycin, gentamicin, ciprofloxacin and sulfamethoxazole / trimethoprim). In this study, 72% of the mecA-positive strains (MRSA and SCN) were identified as SCCmec I or II, suggesting that these infections were contracted in the hospital environment, and 28% of MRSA strains were identified as SCCmec type IV, suggesting that such infections originate in the Community environment. The lukF / S gene was present in 3 samples, all containing the SCCmec IV, confirming the studies of several authors, reporting the production of PVL in strains of community origin. |
id |
UCB_a1e9e6b6aac5e5511e12b55046bb8e9b |
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oai_identifier_str |
oai:bdtd.ucb.br:tede/2562 |
network_acronym_str |
UCB |
network_name_str |
Biblioteca Digital de Teses e Dissertações da UCB |
spelling |
Dias, Simoni Camposhttp://lattes.cnpq.br/1564224041415405http://lattes.cnpq.br/4189185040776284Araújo, Rômulo Leles da Silva2019-05-20T19:10:10Z2019-02-28ARAÚJO, Rômulo Leles da Silva. Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016. 2019. 69 f. Dissertação (Programa Stricto Sensu em Ciências Genômicas e Biotecnologia) - Universidade Católica de Brasília, Brasília, 2019.https://bdtd.ucb.br:8443/jspui/handle/tede/2562The genus Staphylococcus has 36 species and several subspecies, being S. aureus, species of greater clinical interest. For even if it belongs to the human's microbiota, this microorganism, when it can penetrate the tissues due to trauma, injury or low immunity, can develop asymptomatic infections or even serious infections. The vast majority of strains of this genus have resistance against the most different types of antibiotics, which has become a concern from the clinical and control point of these bacteria. Methicillin-resistant strains are called MRSA and can become multi-resistant to other antibiotics, making treatment difficult and costly. The phenotypic and genotypic characterization of the strains is of paramount importance for the knowledge of resistance genes and pathogenicity molecules in order to aid the control as well as the cost of the treatment. In this work, 31 strains of Staphylococcus ssp. belonging to the bacterioteca of the Central Laboratory of Public Health of the Federal District. The phenotypic characterization was performed in a manual and automated way, being carried out tests for identification of the species through analysis of biochemical tests and characterization of resistance profile by antibiogram. The genotypic characterization was performed using molecular tests by multiplex PCR, where the presence of mecA and lukF/S genes was analyzed. For the strains whose result was positive for the mecA gene, the staphylococcal chromosome cassettes (SCCmec) were typed. The results of this study confirm the conclusions made by other authors, where they observed that MRSA strains in addition to being resistant to beta-lactams, showed resistance to other antibiotics (eg clindamycin, gentamicin, ciprofloxacin and sulfamethoxazole / trimethoprim). In this study, 72% of the mecA-positive strains (MRSA and SCN) were identified as SCCmec I or II, suggesting that these infections were contracted in the hospital environment, and 28% of MRSA strains were identified as SCCmec type IV, suggesting that such infections originate in the Community environment. The lukF / S gene was present in 3 samples, all containing the SCCmec IV, confirming the studies of several authors, reporting the production of PVL in strains of community origin.O gênero Staphylococcus possui 36 espécies e várias subespécies, sendo o S. aureus, espécie de maior interesse clínico. Mesmo sendo pertencente a microbiota do ser humano, este microrganismo quando consegue penetrar nos tecidos devido a traumas, lesões ou baixa imunidade pode desenvolver infecções assintomáticas ou até mesmo infecções gravíssimas. A maioria das cepas deste gênero possui resistência contra os mais diferentes tipos de antibióticos, o que tem se tornado uma preocupação do ponto de vista clínico e de controle destas bactérias. As cepas resistentes à meticilina, são denominadas como MRSA, podendo se tornar multirresistente a outros antibióticos, tornando o tratamento difícil e oneroso. A caracterização fenotípica e genotípica das cepas é de suma importância para o conhecimento dos genes de resistência e virulência com o intuito de auxiliar o controle assim como o custo do tratamento. Neste trabalho foram caracterizadas 31 cepas de Staphylococcus ssp. pertencentes à bacterioteca do Laboratório Central de Saúde Pública do Distrito Federal. A caracterização fenotípica foi realizada de forma manual e automatizada, sendo realizados ensaios para identificação da espécie por meio da análise de testes bioquímicos e a caracterização do perfil de resistência por antibiograma. A caracterização genotípica foi realizada utilizando testes moleculares por PCR multiplex, que analisou a presença dos genes mecA e lukF/S. Para as cepas cujo resultado foi positivo para o gene mecA, foi realizada a tipificação dos cassetes cromossômicos estafilocócico (SCCmec). Nesta pesquisa, 72% das cepas mecA-positivo (MRSA e SCN), foram identificadas como SCCmec I ou II, sugerindo-se que estas infecções foram contraídas no ambiente hospitalar, e 28% das cepas MRSA foram identificadas como SCCmec tipo IV, propondo que tais infecções têm origem no ambiente comunitário. O gene lukF/S esteve presente em 3 amostras pesquisadas, todas contendo o SCCmec IV.Submitted by Sara Ribeiro (sara.ribeiro@ucb.br) on 2019-05-20T19:09:59Z No. of bitstreams: 1 RomuloLelesdaSilvaAraujoDissertacao2019.pdf: 1442848 bytes, checksum: 07322e78c12a6b86f0287b7090733417 (MD5)Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2019-05-20T19:10:10Z (GMT) No. of bitstreams: 1 RomuloLelesdaSilvaAraujoDissertacao2019.pdf: 1442848 bytes, checksum: 07322e78c12a6b86f0287b7090733417 (MD5)Made available in DSpace on 2019-05-20T19:10:10Z (GMT). No. of bitstreams: 1 RomuloLelesdaSilvaAraujoDissertacao2019.pdf: 1442848 bytes, checksum: 07322e78c12a6b86f0287b7090733417 (MD5) Previous issue date: 2019-02-28application/pdfhttps://bdtd.ucb.br:8443/jspui/retrieve/6356/RomuloLelesdaSilvaAraujoDissertacao2019.pdf.jpgporUniversidade Católica de BrasíliaPrograma Stricto Sensu em Ciências Genômicas e BiotecnologiaUCBBrasilEscola de Saúde e MedicinaMRSAStaphylococcusCaracterização genotípicaGenotypic characterizationCNPQ::CIENCIAS BIOLOGICASAvaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UCBinstname:Universidade Católica de Brasíliainstacron:UCBTHUMBNAILRomuloLelesdaSilvaAraujoDissertacao2019.pdf.jpgRomuloLelesdaSilvaAraujoDissertacao2019.pdf.jpgimage/jpeg5115https://bdtd.ucb.br:8443/jspui/bitstream/tede/2562/4/RomuloLelesdaSilvaAraujoDissertacao2019.pdf.jpgbbfc37f5561f583dae62ef99a316676fMD54TEXTRomuloLelesdaSilvaAraujoDissertacao2019.pdf.txtRomuloLelesdaSilvaAraujoDissertacao2019.pdf.txttext/plain133515https://bdtd.ucb.br:8443/jspui/bitstream/tede/2562/3/RomuloLelesdaSilvaAraujoDissertacao2019.pdf.txt0b17cc892347d54ef0f29e6e58e688a4MD53ORIGINALRomuloLelesdaSilvaAraujoDissertacao2019.pdfRomuloLelesdaSilvaAraujoDissertacao2019.pdfapplication/pdf1442848https://bdtd.ucb.br:8443/jspui/bitstream/tede/2562/2/RomuloLelesdaSilvaAraujoDissertacao2019.pdf07322e78c12a6b86f0287b7090733417MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81905https://bdtd.ucb.br:8443/jspui/bitstream/tede/2562/1/license.txt75558dcf859532757239878b42f1c2c7MD51tede/2562oai:bdtd.ucb.br:tede/25622019-05-21 01:06:18.125Biblioteca Digital de Dissertações da Universidade Católica de Brasília - UCBsdi@ucb.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 |
dc.title.por.fl_str_mv |
Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016 |
title |
Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016 |
spellingShingle |
Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016 Araújo, Rômulo Leles da Silva MRSA Staphylococcus Caracterização genotípica Genotypic characterization CNPQ::CIENCIAS BIOLOGICAS |
title_short |
Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016 |
title_full |
Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016 |
title_fullStr |
Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016 |
title_full_unstemmed |
Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016 |
title_sort |
Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016 |
author |
Araújo, Rômulo Leles da Silva |
author_facet |
Araújo, Rômulo Leles da Silva |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Dias, Simoni Campos |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/1564224041415405 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/4189185040776284 |
dc.contributor.author.fl_str_mv |
Araújo, Rômulo Leles da Silva |
contributor_str_mv |
Dias, Simoni Campos |
dc.subject.por.fl_str_mv |
MRSA Staphylococcus Caracterização genotípica |
topic |
MRSA Staphylococcus Caracterização genotípica Genotypic characterization CNPQ::CIENCIAS BIOLOGICAS |
dc.subject.eng.fl_str_mv |
Genotypic characterization |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS BIOLOGICAS |
dc.description.abstract.eng.fl_txt_mv |
The genus Staphylococcus has 36 species and several subspecies, being S. aureus, species of greater clinical interest. For even if it belongs to the human's microbiota, this microorganism, when it can penetrate the tissues due to trauma, injury or low immunity, can develop asymptomatic infections or even serious infections. The vast majority of strains of this genus have resistance against the most different types of antibiotics, which has become a concern from the clinical and control point of these bacteria. Methicillin-resistant strains are called MRSA and can become multi-resistant to other antibiotics, making treatment difficult and costly. The phenotypic and genotypic characterization of the strains is of paramount importance for the knowledge of resistance genes and pathogenicity molecules in order to aid the control as well as the cost of the treatment. In this work, 31 strains of Staphylococcus ssp. belonging to the bacterioteca of the Central Laboratory of Public Health of the Federal District. The phenotypic characterization was performed in a manual and automated way, being carried out tests for identification of the species through analysis of biochemical tests and characterization of resistance profile by antibiogram. The genotypic characterization was performed using molecular tests by multiplex PCR, where the presence of mecA and lukF/S genes was analyzed. For the strains whose result was positive for the mecA gene, the staphylococcal chromosome cassettes (SCCmec) were typed. The results of this study confirm the conclusions made by other authors, where they observed that MRSA strains in addition to being resistant to beta-lactams, showed resistance to other antibiotics (eg clindamycin, gentamicin, ciprofloxacin and sulfamethoxazole / trimethoprim). In this study, 72% of the mecA-positive strains (MRSA and SCN) were identified as SCCmec I or II, suggesting that these infections were contracted in the hospital environment, and 28% of MRSA strains were identified as SCCmec type IV, suggesting that such infections originate in the Community environment. The lukF / S gene was present in 3 samples, all containing the SCCmec IV, confirming the studies of several authors, reporting the production of PVL in strains of community origin. |
dc.description.abstract.por.fl_txt_mv |
O gênero Staphylococcus possui 36 espécies e várias subespécies, sendo o S. aureus, espécie de maior interesse clínico. Mesmo sendo pertencente a microbiota do ser humano, este microrganismo quando consegue penetrar nos tecidos devido a traumas, lesões ou baixa imunidade pode desenvolver infecções assintomáticas ou até mesmo infecções gravíssimas. A maioria das cepas deste gênero possui resistência contra os mais diferentes tipos de antibióticos, o que tem se tornado uma preocupação do ponto de vista clínico e de controle destas bactérias. As cepas resistentes à meticilina, são denominadas como MRSA, podendo se tornar multirresistente a outros antibióticos, tornando o tratamento difícil e oneroso. A caracterização fenotípica e genotípica das cepas é de suma importância para o conhecimento dos genes de resistência e virulência com o intuito de auxiliar o controle assim como o custo do tratamento. Neste trabalho foram caracterizadas 31 cepas de Staphylococcus ssp. pertencentes à bacterioteca do Laboratório Central de Saúde Pública do Distrito Federal. A caracterização fenotípica foi realizada de forma manual e automatizada, sendo realizados ensaios para identificação da espécie por meio da análise de testes bioquímicos e a caracterização do perfil de resistência por antibiograma. A caracterização genotípica foi realizada utilizando testes moleculares por PCR multiplex, que analisou a presença dos genes mecA e lukF/S. Para as cepas cujo resultado foi positivo para o gene mecA, foi realizada a tipificação dos cassetes cromossômicos estafilocócico (SCCmec). Nesta pesquisa, 72% das cepas mecA-positivo (MRSA e SCN), foram identificadas como SCCmec I ou II, sugerindo-se que estas infecções foram contraídas no ambiente hospitalar, e 28% das cepas MRSA foram identificadas como SCCmec tipo IV, propondo que tais infecções têm origem no ambiente comunitário. O gene lukF/S esteve presente em 3 amostras pesquisadas, todas contendo o SCCmec IV. |
description |
The genus Staphylococcus has 36 species and several subspecies, being S. aureus, species of greater clinical interest. For even if it belongs to the human's microbiota, this microorganism, when it can penetrate the tissues due to trauma, injury or low immunity, can develop asymptomatic infections or even serious infections. The vast majority of strains of this genus have resistance against the most different types of antibiotics, which has become a concern from the clinical and control point of these bacteria. Methicillin-resistant strains are called MRSA and can become multi-resistant to other antibiotics, making treatment difficult and costly. The phenotypic and genotypic characterization of the strains is of paramount importance for the knowledge of resistance genes and pathogenicity molecules in order to aid the control as well as the cost of the treatment. In this work, 31 strains of Staphylococcus ssp. belonging to the bacterioteca of the Central Laboratory of Public Health of the Federal District. The phenotypic characterization was performed in a manual and automated way, being carried out tests for identification of the species through analysis of biochemical tests and characterization of resistance profile by antibiogram. The genotypic characterization was performed using molecular tests by multiplex PCR, where the presence of mecA and lukF/S genes was analyzed. For the strains whose result was positive for the mecA gene, the staphylococcal chromosome cassettes (SCCmec) were typed. The results of this study confirm the conclusions made by other authors, where they observed that MRSA strains in addition to being resistant to beta-lactams, showed resistance to other antibiotics (eg clindamycin, gentamicin, ciprofloxacin and sulfamethoxazole / trimethoprim). In this study, 72% of the mecA-positive strains (MRSA and SCN) were identified as SCCmec I or II, suggesting that these infections were contracted in the hospital environment, and 28% of MRSA strains were identified as SCCmec type IV, suggesting that such infections originate in the Community environment. The lukF / S gene was present in 3 samples, all containing the SCCmec IV, confirming the studies of several authors, reporting the production of PVL in strains of community origin. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-05-20T19:10:10Z |
dc.date.issued.fl_str_mv |
2019-02-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
status_str |
publishedVersion |
format |
masterThesis |
dc.identifier.citation.fl_str_mv |
ARAÚJO, Rômulo Leles da Silva. Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016. 2019. 69 f. Dissertação (Programa Stricto Sensu em Ciências Genômicas e Biotecnologia) - Universidade Católica de Brasília, Brasília, 2019. |
dc.identifier.uri.fl_str_mv |
https://bdtd.ucb.br:8443/jspui/handle/tede/2562 |
identifier_str_mv |
ARAÚJO, Rômulo Leles da Silva. Avaliação genotípica e fenotípica de cepas de Staphylococcus ssp. isoladas em hospitais do Distrito Federal no período de 2009 a 2016. 2019. 69 f. Dissertação (Programa Stricto Sensu em Ciências Genômicas e Biotecnologia) - Universidade Católica de Brasília, Brasília, 2019. |
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