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ElSafadi, Dima, Hitchins, Lisa, Howard, Ashleigh, Aley, P, Bowman, J, Bertran, M, Collins, Andrea ORCID: https://orcid.org/0000-0002-4094-1572, Colin-Jones, R, Elterish, F, Fry, N K, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Gould, K, Hinds, J, Horn, Emilie, Hyder-Wright, Angela, Kandasamy, R, Ladhani, S, Litt, D, Mitsi, Elena, Murphy, Annabel, Pollard, A J, Plested, E, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Ratcliffe, H, Robertson, Maria, Robinson, H, Snape, M D, SolorzanoGonzalez, Carla, Voysey, M, Begier, E, Catusse, J, Lahuerta, M, Theilacker, C, Gessner, B D, Tiley, K S and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2025)
'Pneumococcal carriage and disease in adults in England 2011-2019: the importance of adults as a reservoir for pneumococcus in communities'. Journal of Infectious Disease, Vol 231, Issue 1, e17-e27.
German, Esther, Nabwera, Helen, Robinson, Ryan, Shiham, Farah, Liatsikos, Kostas, Parry, Christopher M., McNamara, Claire, Kattera, Sanjana, Carter, Katie, Howard, Ashleigh, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Hamilton, Joshua, Matope, Agnes, Read, Jonathan M., Allen, Stephen
ORCID: https://orcid.org/0000-0001-6675-249X, Hill, Helen, Hawcutt, Daniel B., Urban, Britta
ORCID: https://orcid.org/0000-0002-4197-8393, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902 and Nikolaou, Elissavet
(2023)
'Participant perceptions and experiences of a novel community-based respiratory longitudinal sampling method in Liverpool, UK: A mixed methods feasibility study'. PLoS ONE, Vol 18, Issue 11, e0294133.
Hill, Helen, Mitsi, Elena, Nikolaou, Elissavet, Blizard, Annie, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Howard, Ashleigh, Hyder-Wright, Angela, Devin, Jack, Reiné, Jesús, Robinson, Ryan, SolorzanoGonzalez, Carla, Jochems, Simon P, Kenny-Nyazika, Tinashe, Ramos-Sevillano, Elisa, Weight, Caroline M, Myerscough, Christopher, McLenaghan, Daniella, Morton, Ben
ORCID: https://orcid.org/0000-0002-6164-2854, Gibbons, Emily, Farrar, Madlen, Randles, Victoria, Burhan, Hassan, Chen, Tao
ORCID: https://orcid.org/0000-0002-5489-6450, Shandling, Adam D, Campo, Joe J, Heyderman, Robert S, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Brown, Jeremy S., Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2023)
'A Randomized Controlled Clinical Trial of Nasal Immunization with Live Virulence Attenuated Streptococcus pneumoniae Strains Using Human Infection Challenge'. American Journal of Respiratory and Critical Care Medicine, Vol 208, Issue 8, pp. 868-878.
Robinson, Ryan, Mitsi, Elena, Nikolaou, Elissavet, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Chen, Tao
ORCID: https://orcid.org/0000-0002-5489-6450, Reiné, Jesús, Nyazika, Tinashe, Court, James, Davies, Kelly, Farrar, Madi, Gonzalez-Diaz, Patricia, Hamilton, Josh, Hill, Helen, Hitchins, Lisa, Howard, Ashleigh, Hyder-Wright, Angela, Lesosky, Maia
ORCID: https://orcid.org/0000-0002-2026-958X, Liatsikos, Kostas, Matope, Agnes, McLenaghan, Daniella, Myerscough, Christopher, Murphy, Annabel, SolorzanoGonzalez, Carla, Wang, Duolao
ORCID: https://orcid.org/0000-0003-2788-2464, Burhan, Hassan, Gautam, Manish, Begier, Elizabeth, Theilacker, Christian, Beavon, Rohini, Anderson, Annaliesa S., Gessner, Bradford D., Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2022)
'Human Infection Challenge with Serotype 3 Pneumococcus'. American Journal of Respiratory and Critical Care Medicine, Vol 206, Issue 11.
Liatsikos, Kostas, Hyder-Wright, Angela, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Chen, Tao
ORCID: https://orcid.org/0000-0002-5489-6450, Wang, Duolao
ORCID: https://orcid.org/0000-0003-2788-2464, Davies, Kelly, Myerscough, Christopher, Reiné, Jesús, Robinson, Ryan, Urban, Britta
ORCID: https://orcid.org/0000-0002-4197-8393, Mitsi, Elena, SolorzanoGonzalez, Carla, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Quinn, Angela, Pan, Kaijie, Anderson, Annaliesa S, Theilacker, Christian, Begier, Elizabeth, Gessner, Bradford D, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2022)
'Protocol for a phase IV double-blind randomised controlled trial to investigate the effect of the 13-valent pneumococcal conjugate vaccine and the 23-valent pneumococcal polysaccharide vaccine on pneumococcal colonisation using the experimental human pneumococcal challenge model in healthy adults (PREVENTING PNEUMO 2)'. BMJ Open, Vol 12, Issue 7, e062109.
Basset, Alan, Wall, Emma, Mitsi, Elena, Deshusses, Chloe, Daly, Raecliffe, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Reiné, Jesús, Guerra-Assuncao, Jose Afonso, Denis, Brigitte, Jochems, Simon
ORCID: https://orcid.org/0000-0002-4835-1032, Heyderman, Robert, Brown, Jeremy, Lu, Ying-Jie, Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902 and Malley, Richard
(2022)
'Targeted Transcriptomic Screen of Pneumococcal Genes Expressed during Murine and Human Infection.'. Infection and immunity, Vol 90, Issue 7, e0017522.
Cheliotis, Katerina, Jewell, Christopher P., SolorzanoGonzalez, Carla, Urban, Britta ORCID: https://orcid.org/0000-0002-4197-8393, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Mitsi, Elena, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Nikolaou, Elissavet, German, Esther, Reiné, Jesús, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Jochems, Simon
ORCID: https://orcid.org/0000-0002-4835-1032, Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2022)
'Influence of sex, season and environmental air quality on experimental human pneumococcal carriage acquisition: a retrospective cohort analysis'. ERJ Open Research, Vol 8, Issue 2, e00586.
Mitsi, Elena, Reiné, Jesús, Urban, Britta ORCID: https://orcid.org/0000-0002-4197-8393, SolorzanoGonzalez, Carla, Nikolaou, Elissavet, Hyder-Wright, Angela, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Howard, Ashleigh, Hitchins, Lisa, Glynn, Sharon, Farrar, Madlen, Liatsikos, Konstantin, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Walker, Naomi
ORCID: https://orcid.org/0000-0002-3345-7694, Hill, Helen, German, Esther, Cheliotis, Katerina, Byrne, Rachel, Williams, Chris, CubasAtienzar, Ana, Fletcher, Tom, Adams, Emily
ORCID: https://orcid.org/0000-0002-0816-2835, Draper, Simon J, Pulido, David, Beavon, Rohini, Theilacker, Christian, Begier, Elizabeth, Jodar, Luis, Gessner, Bradford D and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2022)
'Streptococcus pneumoniae colonization associates with impaired adaptive immune responses against SARS-CoV-2.'. Journal of Clinical Investigation, Vol 132, Issue 7, e157124.
Nikolaou, Elissavet, German, Esther, Blizard, Annie, Howard, Ashleigh, Hitchins, Lisa, Chen, Tao ORCID: https://orcid.org/0000-0002-5489-6450, Chadwick, Jim, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Mitsi, Elena, SolorzanoGonzalez, Carla, Sunny, Syba, Dunne, Felicity, Gritzfeld, Jenna, Adler, Hugh
ORCID: https://orcid.org/0000-0003-4437-2298, Hinds, Jason, Gould, Katherine A., Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2021)
'The nose is the best niche for detection of experimental pneumococcal colonisation in adults of all ages, using nasal wash'. Scientific Reports, Vol 11, Issue 118279.
Adler, Hugh ORCID: https://orcid.org/0000-0003-4437-2298, German, Esther, Mitsi, Elena, Nikolaou, Elissavet, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Hales, Caz, Robinson, Rachel, Connor, Victoria, Hill, Helen, Hyder-Wright, Angela, Lazarova, Lepa, Lowe, Catherine, Smith, Emma, Wheeler, India, Zaidi, Seher, Jochems, Simon
ORCID: https://orcid.org/0000-0002-4835-1032, Loukov, Dessi, Reiné, Jesús, SolorzanoGonzalez, Carla, de Gorguette d’Argoeuves, Polly, Jones, Tessa, Goldblatt, David, Chen, Tao
ORCID: https://orcid.org/0000-0002-5489-6450, Aston, Stephen J, French, Neil, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902 and Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611
(2021)
'Experimental Human Pneumococcal Colonization in Older Adults is Feasible and Safe, Not Immunogenic'. American Journal of Respiratory and Critical Care Medicine, Vol 203, Issue 5, pp. 604-613.
Carniel, Beatriz, Marcon, Fernando, Rylance, Jamie ORCID: https://orcid.org/0000-0002-2323-3611, German, Esther, Zaidi, Seher, Reiné, Jesús, Negera, Edessa, Nikolaou, Elissavet, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, SolorzanoGonzalez, Carla, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Connor, Victoria, Bogaert, Debbie, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Nakaya, Helder I, Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902, Jochems, Simon
ORCID: https://orcid.org/0000-0002-4835-1032 and Mitsi, Elena
(2021)
'Pneumococcal colonization impairs mucosal immune responses to Live Attenuated Influenza Vaccine in adults'. JCI insight, Vol 6, Issue 4, p. 141088.
Nikolaou, Elissavet, Jochems, Simon ORCID: https://orcid.org/0000-0002-4835-1032, Mitsi, Elena, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Blizard, Annie, Reiné, Jesús, SolorzanoGonzalez, Carla, Negera, Edessa, Carniel, Beatriz, Soares-Schanoski, Alessandra, Connor, Victoria, Adler, Hugh
ORCID: https://orcid.org/0000-0003-4437-2298, Zaidi, Seher, Hales, Caz, Hill, Helen, Hyder-Wright, Angela, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2021)
'Experimental Human Challenge Defines Distinct Pneumococcal Kinetic Profiles and Mucosal Responses between Colonized and Non-Colonized Adults.'. mBio, Vol 12, Issue 1.
Hales, Caz, Jochems, Simon P, Robinson, Rachel, SolorzanoGonzalez, Carl, Carniel, Biatriz, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Reiné, Jesús, German, Esther, Nikolaou, Elissavet, Mitsi, Elena, Hyder-Wright, Angela, Hill, Helen, Adler, Hugh
ORCID: https://orcid.org/0000-0003-4437-2298, Connor, Victoria, Zaidi, Seher, Lowe, Catherine, Fan, Xiaojing, Wang, Duolao
ORCID: https://orcid.org/0000-0003-2788-2464, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2020)
'Symptoms associated with influenza vaccination and experimental
human pneumococcal colonisation of the nasopharynx'. Vaccine, Vol 38, Issue 10, pp. 2298-2306.
Mitsi, Elena, Carniel, Beatriz, Reiné, Jesús, Rylance, Jamie ORCID: https://orcid.org/0000-0002-2323-3611, Zaidi, Seher, Soares-Schanoski, Alessandra, Connor, Victoria, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Schlitzer, Andreas, Nikolaou, Elissavet, SolorzanoGonzalez, Carla, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Hill, Helen, Hyder-Wright, Angela, Jambo, Kondwani
ORCID: https://orcid.org/0000-0002-3195-2210, Oggioni, Marco R, De Ste Croix, Megan, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Jochems, Simon
ORCID: https://orcid.org/0000-0002-4835-1032 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2020)
'Nasal Pneumococcal Density is Associated with Microaspiration and Heightened Human Alveolar Macrophage Responsiveness to Bacterial Pathogens.'. American Journal of Respiratory and Critical Care Medicine, Vol 201, Issue 3, pp. 335-347.
Nikolaou, Elissavet, Blizard, Annie, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Mitsi, Elena, German, Esther, Reiné, Jesús, Hill, Helen, McNamara, Paul S, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902 and Jochems, Simon
ORCID: https://orcid.org/0000-0002-4835-1032
(2019)
'Minimally Invasive Nasal Sampling in Children Offers Accurate Pneumococcal Colonization Detection.'. Pediatric Infectious Disease Journal, Vol 38, Issue 11, pp. 1147-1149.
Jochems, Simon ORCID: https://orcid.org/0000-0002-4835-1032, de Ruiter, Karin, SolorzanoGonzalez, Carla
ORCID: https://orcid.org/0000-0001-9129-5569, Voskamp, Astrid, Mitsi, Elena
ORCID: https://orcid.org/0000-0001-7586-6050, Nikolaou, Elissavet, Carniel, Beatriz, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, German, Esther, Reiné, Jesús
ORCID: https://orcid.org/0000-0001-7462-2054, Soares-Schanoski, Alessandra, Hill, Helen, Robinson, Rachel, Hyder-Wright, Angela, Weight, Caroline, Durrenberger, Pascal F., Heyderman, Robert, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Smits, Hermelijn H., Urban, Britta
ORCID: https://orcid.org/0000-0002-4197-8393, Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Wilkie, Mark D., Lazarova, Lepa, Leong, Samuel
ORCID: https://orcid.org/0000-0002-7213-0387, Yazdanbakhsh, Maria and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2019)
'Innate and adaptive nasal mucosal immune responses following experimental human pneumococcal colonization'. Journal of Clinical Investigation, Vol 129, Issue 10, pp. 4523-4538.
Weight, Caroline M, Venturini, Cristina, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Jochems, Simon
ORCID: https://orcid.org/0000-0002-4835-1032, Reiné, Jesús, Nikolaou, Elissavet, SolorzanoGonzalez, Carla, Noursadeghi, Mahdad, Brown, Jeremy S, Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902 and Heyderman, Robert S
(2019)
'Microinvasion by Streptococcus pneumoniae induces epithelial innate immunity during colonisation at the human mucosal surface.'. Nature Communications, Vol 10, Issue 1, e3060.
de Steenhuijsen Piters, Wouter A A, Jochems, Simon ORCID: https://orcid.org/0000-0002-4835-1032, Mitsi, Elena, Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Nikolaou, Elissavet, German, Esther, Holloway, Mark, Carniel, Beatriz, Chu, Mei Ling J N, Arp, Kayleigh, Sanders, Elisabeth A M, Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902 and Bogaert, Debby
(2019)
'Interaction between the nasal microbiota and S. pneumoniae in the context of live-attenuated influenza vaccine.'. Nature Communications, Vol 10, Issue 1, p. 2981.
Adler, Hugh ORCID: https://orcid.org/0000-0003-4437-2298, Nikolaou, Elissavet, Gould, Katherine, Hinds, Jason, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Connor, Victoria, Hales, Caz, Hill, Helen, Hyder-Wright, Angela, Zaidi, Seher, German, Esther, Gritzfeld, Jenna, Mitsi, Elena, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116, Roberts, Adam
ORCID: https://orcid.org/0000-0002-0760-3088, Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2019)
'Pneumococcal colonization in healthy adult research participants in the conjugate vaccine era, United Kingdom, 2010—2017'. Journal of Infectious Disease, Vol 219, Issue 12, pp. 1989-1993.
Jochems, Simon ORCID: https://orcid.org/0000-0002-4835-1032, Marcon, Fernando, Carniel, Beatriz F., Holloway, Mark, Mitsi, Elena, Smith, Emma, Gritzfeld, Jenna, SolorzanoGonzalez, Carla, Reiné, Jesús, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Nikolaou, Elissavet, German, Esther, Hyder-Wright, Angela, Hill, Helen, Hales, Caz, de Steenhuijsen Piters, Wouter A.A, Bogaert, Debby, Adler, Hugh
ORCID: https://orcid.org/0000-0003-4437-2298, Zaidi, Seher, Connor, Victoria, Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611, Nakaya, Helder I and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2018)
'Inflammation induced by influenza virus impairs innate control of human pneumococcal carriage'. Nature Immunology, Vol 19, Issue 12, pp. 1299-1308.
Connor, Victoria, German, Esther, Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279, Mitsi, Elena, Hales, Caroline, Nikolaou, Elissavet, Hyder-Wright, Angela, Adler, Hugh
ORCID: https://orcid.org/0000-0003-4437-2298, Zaidi, Seher, Hill, Helen, Jochems, Simon
ORCID: https://orcid.org/0000-0002-4835-1032, Burhan, Hassan, French, Neil, Tobery, Timothy, Rylance, Jamie
ORCID: https://orcid.org/0000-0002-2323-3611 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2018)
'Hands are vehicles for transmission of Streptococcus pneumoniae in novel controlled human infection study.'. European Respiratory Journal, Vol 52, Issue 4.
Pennington, Shaun ORCID: https://orcid.org/0000-0002-7160-6275, Pojar, Sherin
ORCID: https://orcid.org/0000-0002-7746-3279, Mitsi, Elena, Gritzfeld, Jenna, Nikolaou, Elissavet, SolorzanoGonzalez, Carla, Owugha, Jessica, Masood, Qasim, Gordon, Melita, Wright, Angela, Collins, Andrea
ORCID: https://orcid.org/0000-0002-4094-1572, Miyaji, Eliane N, Gordon, Stephen
ORCID: https://orcid.org/0000-0001-6576-1116 and Ferreira, Daniela
ORCID: https://orcid.org/0000-0002-0594-0902
(2016)
'Polysaccharide-specific memory B-cells predict protection against experimental human 1 pneumococcal carriage'. American Journal of Respiratory and Critical Care Medicine, Vol 194, Issue 12, pp. 1523-1531.
Thesis
Pojar, Sherin ORCID: https://orcid.org/0000-0002-7746-3279
(2021)
Susceptibility to pneumococcal colonization: identifying critical pneumococcal and mucosal markers, Thesis (Doctoral), Liverpool School of Tropical Medicine.