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

Palau R, Bloomfield S, Jenkins C, Greig DR, Jorgensen F, Mather A. (2024)

Yersinia enterocolitica biovar 1A: An underappreciated potential pathogen in the food chain

International Journal of Food Microbiology, 412, 110554

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Bloomfield SJ, Zomer AL, O'Grady J, Kay GL, Wain J, Janecko N, Palau R, Mather A. (2022)

Determination and quantification of microbial communities and antimicrobial resistance on food through host DNA-depleted metagenomics

Food Microbiology

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Djeghout B, Bloomfield S, Rudder S, Elumogo N, Mather A, Wain J, Janecko . (2022)

Comparative genomics of Campylobacter jejuni from clinical campylobacteriosis stool specimens

Gut Pathogens

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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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