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Characterization of biological and metabolic responses to pH changes in a commensal Staphylococcus epidermidis strain

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Detalhes bibliográficos
Resumo:"Staphylococcus epidermidis is a Gram-positive commensal bacterium found mainly in mucous membranes but also in sebaceous areas. It is considered an opportunistic pathogen associated with nosocomial infections. Indeed, S. epidermidis is the main cause of coagulase negative staphylococci infections associated with medical devices. This thesis aims to understand the impact of pH conditions which mimic the skin pH (5.5) and blood pH (7.4) in a S. epidermidis commensal strain (19N) biological processes and metabolic pathways. Proteomic studies were realized by nanoscale liquid chromatography-tandem mass spectrometry (nano LC-MS/MS) and metabolomic studies through nuclear magnetic resonance (NMR) in the whole cellular extract."
Autores principais:Santos, Susana Isabel Duarte dos
Assunto:Staphylococcus epidermidis infection process proteomic metabolomic
Ano:2019
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:Universidade Nova de Lisboa
Idioma:inglês
Origem:Repositório Institucional da UNL
Descrição
Resumo:"Staphylococcus epidermidis is a Gram-positive commensal bacterium found mainly in mucous membranes but also in sebaceous areas. It is considered an opportunistic pathogen associated with nosocomial infections. Indeed, S. epidermidis is the main cause of coagulase negative staphylococci infections associated with medical devices. This thesis aims to understand the impact of pH conditions which mimic the skin pH (5.5) and blood pH (7.4) in a S. epidermidis commensal strain (19N) biological processes and metabolic pathways. Proteomic studies were realized by nanoscale liquid chromatography-tandem mass spectrometry (nano LC-MS/MS) and metabolomic studies through nuclear magnetic resonance (NMR) in the whole cellular extract."