Dr Samuel Bloomfield


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Epidemiology, genomics and antimicrobial resistance of bacteria


I am a PostDoctoral Research Scientist at the Institute. My research interests include how pathogenic bacteria evolve, how they are transmitted and how they develop resistance to antibiotics. I completed my PhD at Massey University in 2017, studying the evolution and transmission of bacterial enteritis agents over the course of outbreaks.

In my current role, I use whole-genome sequencing to investigate the sources and spread of pathogenic and commensal bacteria, and the reservoirs and transfer of antimicrobial resistance in the food chain.

Key Publications

Bloomfield, S.J., Benschop, J., Biggs, P.J., Marshall, J.C., Hayman, D.T.S., Carter, P.E., Midwinter, A.C., Mather, A.E., French, N.P., 2017. Genomic analysis of Salmonella enterica serovar Typhimurium DT160 associated with a 14-year outbreak, New Zealand, 1998-2012. Emerg. Infect. Dis. 23, 906–913. doi:10.3201/eid2306.161934

Bloomfield, S.J., Midwinter, A.C., Biggs, P.J., French, N.P., Marshall, J.C., Hayman, D.T.S., Carter, P.E., Thornley, C., Yap, R., Benschop, J., 2018. Long-term colonization by Campylobacter jejuni within a human host: evolution, antimicrobial resistance, and adaptation. J. Infect. Dis. 217, 103–111. doi:10.1093/infdis/jix561

Bloomfield S, Duong VT, Tuyen HT, Campbell JI, Thomson NR, Parkhill J, Le Phuc, Chau TTH, Maskell DJ, Perron GG, Ngoc NM, Vi LL, Adriaenssens EM, Baker S, Mather A. (2022)

Mobility of antimicrobial resistance across serovars and disease presentations in non-typhoidal Salmonella from animals and humans in Vietnam.

Microbial genomics

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de Oliveira Martins L, Bloomfield S, Stoakes E, Grant AJ, Page AJ, Mather A. (2022)

Tatajuba: exploring the distribution of homopolymer tracts.

NAR genomics and bioinformatics

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Bloomfield S,Benschop J,Midwinter AC,Biggs PJ,Marshall JC,Hayman DTS,Carter PE,Price-Carter M,Toombs-Ruane L,Gray H,Burgess S,French NP. (2021)

Genomic and phenotypic comparison of two Salmonella Typhimurium strains responsible for consecutive salmonellosis outbreaks in New Zealand

International Journal of Medical Microbiology

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Bloomfield SJ, Midwinter AC, Biggs PJ, French NP, Marshall JC, Hayman DTS, Carter PE, Mather AE, Fayaz A, Thornley C, Kelly DJ, Benschop J. (2021)

Genomic adaptations of Campylobacter jejuni to long-term human colonization

Gut Pathogens, 13

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Lee WWY, Mattock J, Greig DR, Langridge GC, Baker D, Bloomfield S, Mather AE, Wain JR, Edwards AM, Hartman H, Dallman TJ, Chattaway MA, Nair S. (2021)

Characterization of a pESI-like plasmid and analysis of multidrug-resistant Salmonella enterica Infantis isolates in England and Wales

Microbial Genomics, 7, 10

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Bloomfield S., Wilkinson D., Rogers L., Biggs P., French N., Mohan V., Savoian M., Venter P., Midwinter A.. (2020)

Campylobacter novaezeelandiae sp. nov., isolated from birds and water in New Zealand.

International journal of systematic and evolutionary microbiology

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