Bio

Participação na FM-UCP

  • Coordenador da unidade curricular Laboratório de Evolução Microbiana

(Mestrado Integrado em Medicina)

  • Tutor na unidade curricular Crescimento e Desenvolvimento I

(Mestrado Integrado em Medicina)

  • Tutor na unidade curricular Digestão e Defesa I

(Mestrado Integrado em Medicina)

  • Coordenador da unidade curricular Microbiologia & Imunologia

(Mestrado em Imunologia e Vacinologia)

  • Coordenador Principal do Laboratório de Evolução do Microbioma

Áreas de Actividade

Microbiologia | Evolução | Microbioma | Resistência a antibióticos | Terapia fágica

Actividade Profissional

  • Faculdade de Medicina da Universidade Católica
  • Plataforma CatólicaMed - Centro de Investigação Interdisciplinar em Saúde

Formação

  • Licenciatura em Biologia Microbiana e Genética — Universidade de Lisboa, Portugal
  • Doutoramento em Biologia Molecular — Universidade Nova de Lisboa, Portugal; The Rockefeller University, New York, USA
  • Investigação pós-doutoral — Universidade Nova de Lisboa, Portugal; Radboud University, The Netherlands; Instituto Gulbenkian de Ciência, Portugal

Resumo da Carreira Profissional

Após o término da licenciatura em Biologia Microbiana e Genética pela Universidade de Lisboa, em 2002, Nelson Frazão integrou o Instituto de Tecnologia Química e Biológica (ITQB). Em 2006, iniciou os seus estudos de doutoramento, desenvolvendo investigação tanto no ITQB (Portugal) como na The Rockefeller University (USA). O seu trabalho doutoral focou-se no estudo da virulência e nos padrões epidemiológicos de um dos principais agentes patogénicos em humanos, Streptococcus pneumoniae, tendo obtido o grau de Doutor em Biologia Molecular pela Universidade Nova de Lisboa em 2010.

Nos primeiros anos da sua investigação pós-doutoral, Nelson aprofundou os seus conhecimentos em modelos animais na Universidade de Radboud, nos Países Baixos. Em 2014, reorientou o seu foco de investigação para a evolução microbiana e integrou o grupo de Biologia Evolutiva do Instituto Gulbenkian de Ciência como investigador pós-doutorado sénior, estudando a evolução genética de Escherichia coli durante a colonização do intestino de mamíferos.

Desde Outubro de 2024 que Nelson Frazão é Professor na Faculdade de Medicina da Universidade Católica Portuguesa e Investigador Principal do Laboratório de Evolução do Microbioma, integrado na Plataforma CatólicaMed do Centro de Investigação Interdisciplinar em Saúde.

Laboratório de Evolução do Microbioma

O laboratório investiga a evolução genética de bactérias e dos seus bacteriófagos associados em diferentes condições fisiológicas do hospedeiro — como a gravidez e o cancro — onde pode emergir resistência bacteriana aos antibióticos.

Os nossos principais sistemas modelo incluem E. coli, os seus bacteriófagos associados e o rato de laboratório (Mus musculus). A E. coli é um membro comum do microbioma intestinal humano, enquanto o M. musculus é um modelo amplamente reconhecido para o estudo da biologia dos mamíferos, em particular da biologia humana.

O nosso laboratório adota uma abordagem multidisciplinar que integra bioquímica, biologia molecular, genómica (incluindo tecnologias de sequenciação de curta e longa leitura) e bioinformática para explorar a dinâmica evolutiva das bactérias e dos seus bacteriófagos.

O objetivo final da nossa investigação é tirar partido da evolução microbiana para gerar conhecimento fundamental que possa ser traduzido em aplicações clínicas com vista à melhoria da saúde humana.

Línguas

Português | Inglês

Programas:

  • Mestrado Integrado em Medicina
  • Mestrado em Imunologia e Vacinologia

Modules/Courses:

  • Unidade curricular Laboratório de Evolução Microbiana
Artigo

Clonal interference and genomic repair during strain coexistence in the gut

Nelson Frazão (with Nelson Frazão). 2025. PLOS Genetics
Artigo

Evolution of Escherichia coli strains under competent or compromised adaptive immunity

Nelson Frazão (with Ameline, Camille). 2025. PLOS Pathogens
Artigo

Ecotype formation and prophage domestication during gut bacterial evolution.

Nelson Frazão (with Frazão N). 2023. BioEssays : news and reviews in molecular, cellular and developmental biology
Outras

Gut Bacterial Evolution during Pregnancy

Nelson Frazão (with Joana Bom). 2023. Microbiotec23 - Congresso de Microbiologia e Biotecnologia 2023. Universidade da Beira Interior. Covilhã. Portugal. December 7-9, 2023.
Outras

Shared Evolutionary Path in Social Microbiomes

Nelson Frazão (with Frazão, Nelson). 2023. Microbiotec23 - Congresso de Microbiologia e Biotecnologia 2023. Universidade da Beira Interior. Covilhã. Portugal. December 7-9, 2023.
Artigo

Shared Evolutionary Path in Social Microbiomes.

Nelson Frazão (with Frazão N). 2023. Molecular biology and evolution
Outras

Effect of social microbiomes on the pattern of gut bacterial evolution

Nelson Frazão (with Nelson Frazão). 2022. 7th annual meeting of the International Society for Evolution, Medicine and Public Health
Outras

Two modes of evolution shape bacterial strain diversity in the gut for thousands of generations

Nelson Frazão (with N. Frazão). 2022.
Artigo

Two modes of evolution shape bacterial strain diversity in the mammalian gut for thousands of generations

Nelson Frazão (with N. Frazão). 2022. Nature Communications
Artigo

DNA breaks-mediated fitness cost reveals RNase HI as a new target for selectively eliminating antibiotic-resistant bacteria

Nelson Frazão (with Roberto Balbontín). 2021. Molecular Biology and Evolution
Outras

Rapid spread of adaptive evolutionary events in social microbiomes

Nelson Frazão (with Frazão, Nelson). 2021. XVII ENBE Annual Meeting of the Portuguese Association for Evolutionary Biology. December 16-17, 2021.
Artigo

Mutation accumulation and horizontal gene transfer in Escherichia coli colonizing the gut of old mice

Nelson Frazão (with Hugo C. Barreto). 2020. Communicative and Integrative Biology
Artigo

Horizontal gene transfer overrides mutation in Escherichia coli colonizing the mammalian gut

Nelson Frazão (with Nelson Frazão). 2019. Proceedings of the National Academy of Sciences
Artigo

Evolution of commensal bacteria in the intestinal tract of mice

Nelson Frazão (with Ana Sousa). 2017. Current Opinion in Microbiology
Artigo

Ability of Antibiotic-Resistant Nonvaccine-Type Pneumococcal Clones to Cause Otitis Media in an Infant Mouse Model of Pneumococcal–Influenza Virus Confection

Nelson Frazão 2016. Microbial Drug Resistance
Artigo

Virulence Potential and Genome-Wide Characterization of Drug Resistant Streptococcus pneumoniae Clones Selected In Vivo by the 7-Valent Pneumococcal Conjugate Vaccine

Nelson Frazão (with Nelson Frazão). 2013. PLoS one
Artigo

In Vivo Capsular Switch in Streptococcus pneumoniae - Analysis by Whole Genome Sequencing

Nelson Frazão (with Fen Z. Hu). 2012. PLoS one
Outras

Streptococcus pneumoniae clones selected by the 7-valent pneumococcal conjugate vaccine in healthy children show invasive potential in mice. Frazão, N., R. Sá-Leão, H. de Lencastre, and A. Tomasz (2012).

Nelson Frazão (with Frazão, Nelson). 2012. 8th International Symposium on Pneumococci and Pneumococcal Diseases (ISPPD), Iguaçu Falls, Brazil, March 11-15, 2012.
Artigo

Analysis of invasiveness of pneumococcal serotypes and clones circulating in portugal before widespread use of conjugate vaccines reveals heterogeneous behavior of clones expressing the same serotype

Nelson Frazão (with Raquel Sá-Leao). 2011. Journal of Clinical Microbiology
Artigo

Impact of a single dose of the 7-valent pneumococcal conjugate vaccine on colonization

Nelson Frazão (with Nelson Frazão). 2010. Vaccine
Outras

Massive shift in the pneumococcal nasopharyngeal flora after the 7-valent conjugate vaccine: epidemiological studies and testing pathogenic potential in animal models.

Nelson Frazão (with Frazão, Nelson). 2010. Universidade Nova de Lisboa Instituto de Tecnologia Química e Biológica
Outras

Pathogenic potential of serotypes selected in vivo by the 7-valent pneumococcal conjugate vaccine in Portugal. Frazão, N., R. Sá-Leão, A. Tomasz, and H. de Lencastre (2010).

Nelson Frazão (with Frazão, Nelson). 2010. 7th International Symposium on Pneumococci and Pneumococcal Diseases (ISPPD), Tel Aviv, Israel. March 14-18, 2010.
Artigo

Changes in pneumococcal serotypes and antibiotypes carried by vaccinated and unvaccinated day-care centre attendees in Portugal, a country with widespread use of the seven-valent pneumococcal conjugate vaccine

Nelson Frazão (with R. Sá-Leão). 2009. Clinical Microbiology and Infection
Outras

Effect of a single dose of the 7-valent pneumococcal conjugate vaccine (PCV7) on the composition of the nasopharyngeal flora. Frazão, N., R. Sá-Leão, and H. de Lencastre (2009).

Nelson Frazão (with Frazão, Nelson). 2009. Europneumo 2009 – 9th European Meeting on the Molecular Biology of the Pneumococcus. Bern, Switzerland, June 4-7, 2009.
Outras

Effect of one dose of the 7-valent pneumococcal conjugate vaccine (PCV7) on single and multiple colonization. Frazão, N., R. Sá-Leão and H. de Lencastre (2009).

Nelson Frazão (with Frazão, Nelson). 2009. Microbiotec09. Vilamoura. Portugal. November 28-30, 2009.
Outras

Impact of the 7-valent pneumococcal conjugate vaccine in the nasopharyngeal flora of Portuguese children. Brito-Avô A., R. Sá-Leão, S. Nunes, N. Frazão, A. S. Simões, N. G. Sousa, R. Mato, I. Crisóstomo, J. Saldanha, I. Santos-Sanches, and H. d...

Nelson Frazão (with Frazão, Nelson). 2007. 5th World Congress of the World Society for Pediatric Infectious Diseases – WSPID. Bangkok, Thailand. November 15-18, 2007.
Outras

Pilot study on the evolution of Streptococcus pneumoniae expressing non vaccine serotypes after 7-valent pneumococcal conjugate vaccine (Prevenar) usage at day care centers in Lisbon, Portugal. Frazão, N., R. Sá-Leão, S. Nunes, N.G. Sousa, and H. ...

Nelson Frazão (with Frazão, Nelson). 2007. Europneumo 2007 – 8th European Meeting on the Molecular Biology of Pneumococci. Oeiras, Portugal. April 14-17, 2007.
Outras

Quantitative correspondence between Streptococcus pneumoniae typing methods results: how similar are serotyping, Multi-Locus Sequence Typing and Pulsed-Field Gel Electrophoresis type assignments? Carriço, J.A., F.R. Pinto, V. Jakubu, H. Žemlicková...

Nelson Frazão (with Frazão, Nelson). 2007. Europneumo 2007 – 8th European Meeting on the Molecular Biology of Pneumococci. Oeiras, Portugal. April 14-17, 2007.
Outras

Streptococcus pneumoniae drug resistance in non-vaccine serotypes isolated from children vaccinated with the heptavalent conjugate vaccine (PCV7). Frazão, N., R. Sá-Leão, S. Nunes, N. G. Sousa, A. Brito-Avo, J. Saldanha, R. Mato, I. Santos-Sanches...

Nelson Frazão (with Frazão, Nelson). 2007. 3rd Conference on New Frontiers in Microbiology and Infection. Villars-sur-Ollon, Switzerland, October 7-11, 2007.
Outras

Antimicrobial resistance of Streptococcus pneumoniae colonizing Portuguese preschoolers in early 2006. Sá-Leão, R., S. Nunes, N. Frazão, I. Crisóstomo, A. S. Simões, I. Santos-Sanches, A. Brito-Avô, J. Saldanha, and H. de Lencastre (2006).

Nelson Frazão (with Frazão, Nelson). 2006. International Journal of Infectious Diseases - 12th International Congress of Infectious Diseases 2006, Lisbon. June 15-18, 2006.
Artigo

Identification, prevalence and population structure of non-typable Streptococcus pneumoniae in carriage samples isolated from preschoolers attending day-care centres

Nelson Frazão (with Raquel Sá-Leão). 2006. Microbiology
Outras

Serotypes and genetic characterization of a large collection of drug-susceptible pneumococci isolated from preschool children and comparison with drug-resistant pneumococcal lineages. Sá-Leão, R., S. Nunes, N. Frazão, N.G. Sousa, and H. de Lencast...

Nelson Frazão (with Frazão, Nelson). 2006. 5th International Symposium on Pneumococci and Pneumococcal Diseases (ISPPD), Alice Springs, Australia. April 2-6, 2006.
Outras

Accurate identification of non-typeable Streptococcus pneumoniae in asymptomatic carriage. Simões, A.S., R. Sá-Leão, S. Nunes, N.G. Sousa, N. Frazão, and H. de Lencastre (2005).

Nelson Frazão (with Frazão, Nelson). 2005. Congresso Nacional MICRO´05 - BIOTEC´05 2005. Póvoa de Varzim. Portugal. November 30-December 3, 2005.
Outras

Assessing herd immunity of the 7-valent conjugate vaccine on pneumococcal carriage of a Portuguese pediatric population. Frazão, N., R. Sá-Leão, A.C. Santos Paulo, S. Nunes, N.G. Sousa, C. Simas, R. Mato, A. Brito-Avô, J. Saldanha, I. Santos-Sanc...

Nelson Frazão (with Frazão, Nelson). 2005. Congresso Nacional MICRO´05 - BIOTEC´05 2005. Póvoa de Varzim. Portugal. November 30-December 3, 2005.
Artigo

Assessment of band-based similarity coefficients for automatic type and subtype classification of microbial isolates analyzed by pulsed-field gel electrophoresis

Nelson Frazão (with J. A. Carriço). 2005. Journal of Clinical Microbiology
Outras

Effect of the 7-valent conjugate pneumococcal vaccine on the serotype distribution of drug-susceptible and drug-resistant Streptococcus pneumoniae colonizing healthy children attending Day-Care Centers in Lisbon. Frazão, N., S. Nunes, N. G. Sousa, R...

Nelson Frazão (with Frazão, Nelson). 2005. 15th European Congress of Clinical Microbiology and Infectious Diseases, Copenhagen, Denmark. April 2-5, 2005.
Artigo

Effect of the seven-valent conjugate pneumococcal vaccine on carriage and drug resistance of Streptococcus pneumoniae in healthy children attending day-care centers in Lisbon

Nelson Frazão (with Nelson Frazão). 2005. Pediatric Infectious Disease Journal
Artigo

Natural history of drug-resistant clones of Streptococcus pneumoniae colonizing healthy children in Portugal

Nelson Frazão (with R. Mato). 2005. Microbial Drug Resistance
Artigo

Properties of novel international drug-resistant pneumococcal clones identified in day-care centers of Lisbon, Portugal

Nelson Frazão (with Natacha G. Sousa). 2005. Journal of Clinical Microbiology
Outras

Serotype 11A prevalence and clonal diversity in Streptococcus pneumoniae isolated from children attending Day-Care Centers in Lisbon, Portugal. Sousa, N. G., S. Nunes, N. Frazão, R. Sá-Leão, and H. de Lencastre (2005).

Nelson Frazão (with Frazão, Nelson). 2005. in 15th European Congress of Clinical Microbiology and Infectious Diseases, Copenhagen, Denmark. April 2-5, 2005.
Outras

Serotypes and genetic characterization of a large collection of drug-susceptible Streptococcus pneumoniae isolated from pre-school children and comparison with drug-resistant S. pneumoniae lineages. Sá-Leão, R., S. Nunes, N.G. Sousa, N. Frazão, an...

Nelson Frazão (with Frazão, Nelson). 2005. Congresso Nacional MICRO´05 - BIOTEC´05 2005. Póvoa de Varzim. Portugal. November 30-December 3, 2005.
Outras

Inventory of drug resistant clones of Streptococcus pneumoniae colonizing healthy children in Portugal. Nunes, S., N. G. Sousa, C. Simas, N. Frazão, R. Mato, I. Santos-Sanches, H. de Lencastre (2004).

Nelson Frazão (with Frazão, Nelson). 2004. 4th International Symposium on Pneumococci and Pneumococcal Diseases (ISPPD), Helsinki, Finland. May 9-13, 2004.
Outras

Properties of novel international drug-resistant pneumococcal clones identified in day-care centers (DCCs) of Lisbon, Portugal. Sousa, N. G., R. Sá-Leão, S. Nunes, C. Simas, N. Frazão, R. Mato, I. Crisóstomo, I. Santos-Sanches, and H. de Lencastr...

Nelson Frazão (with Frazão, Nelson). 2004. 4th International Symposium on Pneumococci and Pneumococcal Diseases (ISPPD), Helsinki, Finland. May 9-13, 2004.
Outras

Risk factors for Streptococcus pneumoniae carriage in healthy children attending day-care centers (DCCs) in Lisbon and Oeiras, Portugal. Simas, C., N. Frazão, S. Nunes, N. G. Sousa, R. Mato, J. Saldanha, A. Brito-Avô, I. Santos-Sanches, and H. de L...

Nelson Frazão (with Frazão, Nelson). 2004. 4th International Symposium on Pneumococci and Pneumococcal Diseases (ISPPD), Helsinki, Finland. May 9-13, 2004.
Outras

The effect of the 7-valent conjugate pneumococcal vaccine Prevnar on the carriage and drug resistance of S. pneumoniae in healthy children attending Day-Care Centers (DCCs) in Lisbon: decrease in vaccine serotypes but no change in the frequency of ca...

Nelson Frazão (with Frazão, Nelson). 2004. 4th International Symposium on Pneumococci and Pneumococcal Diseases (ISPPD), Helsinki, Finland. May 9-13, 2004. Frazão, N., C. Simas, S. Nunes, N. G. Sousa, R. Mato, J. Saldanha, A. Brito-Avô, I. Santos-Sanches, and H. de Lencastre (2004).
Outras

The majority of drug-resistant pneumococci isolated from children attending day-care centers in two cities of Portugal are representatives of several internationally disseminated clones. Sá-Leão, R., N. G. Sousa, S. Nunes, C. Simas, R. Mato, N. Fra...

Nelson Frazão (with Frazão, Nelson). 2004. 4th International Symposium on Pneumococci and Pneumococcal Diseases (ISPPD), Helsinki, Finland. May 9-13, 2004.
Outras

Clonality of Drug-Resistant Streptococcus pneumoniae colonizing healthy children in Day Care Centers in Lisbon and Oeiras, Portugal. Mato, R., I. Sanches, S. Nunes, N. Sousa, C. Simas, N. Frazão, and H. de Lencastre (2003).

Nelson Frazão (with Frazão, Nelson). 2003. International Conference of NATO and IMAB on Risk Infections and possibilities for Biomedical terrorism. Varna, Bulgaria. May 28-31, 2003.
Outras

Fluctuation of Streptococcus pneumoniae major clones colonizing healthy children. Nunes, S., N.G., Sousa, C. Simas, N. Frazão, R. Mato, I. Santos-Sanches and H. de Lencastre (2003).

Nelson Frazão (with Frazão, Nelson). 2003. Micro03’ – Congresso Nacional de Microbiologia 2003, Tomar. Portugal. November 28–December 2, 2003.
Outras

Genomic Backgrounds of Drug Resistant Pneumococci Colonizing Children Attending Day Care Centers in Portugal. Mato, R., I. Sanches, S. Nunes, N. Sousa, C. Simas, N. Frazão, and H. de Lencastre (2003).

Nelson Frazão (with Frazão, Nelson). 2003. 43rd Interscience Congress on Antimicrobials Agents and Chemotherapy (ICAAC), Chicago, Illinois, USA. September 14-17, 2003.
Outras

Multilocus Sequence Typing (MLST) of Streptococcus pneumoniae representative strains of clones colonizing children attending Day Care Centers. Sousa, N. G., S. Nunes, C. Simas, N. Frazão, R. Mato, I. Crisóstomo, I. Santos-Sanches, and H. de Lencast...

Nelson Frazão (with Frazão, Nelson). 2003. Micro03’ – Congresso Nacional de Microbiologia 2003, Tomar. Portugal. November 28–December 2, 2003.
Outras

Risk Factors for Streptococcus pneumoniae carriage in healthy children attending Day Care Centers in Lisbon and Oeiras, Portugal. Frazão, N., S. Nunes, N. G. Sousa, C. Simas, R. Mato, I. Santos-Sanches and H. de Lencastre (2003).

Nelson Frazão (with Frazão, Nelson). 2003. Micro03’ – Congresso Nacional de Microbiologia 2003. Tomar. Portugal. November 28–December 2, 2003.
Outras

Isolation, identification and characterization of Streptococcus pneumoniae strains recovered from the nasopharynx of children attending Day-Care Centers in Lisbon and Oeiras, Portugal

Nelson Frazão (with Frazão, Nelson). 2002. Fundação da Faculdade de Ciências da Universidade de Lisboa