Dr Samuel Bloomfield

Researcher

Contact via email

Epidemiology, genomics and antimicrobial resistance of bacteria

Links/websites:

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

Nolan LM, Lazenby J, Savva GM, Sweet R, Wickham GJ, Al-Khanaq H, Bloomfield S, Mather AE, Whitchurch CB. (2026)

Tissue destruction during food spoilage is associated with the formation of biofilms by Pseudomonas species

International Journal of Food Microbiology, 447


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Astorga G, Bloomfield S, Palau R, Janecko N, de Oliveira Martins L, Singh D, Zamudio R, Savva GM, Wain J, Mather AE. (2025)

A multi-isolate genomic approach identifies diverse Escherichia coli contamination and antimicrobial resistance carriage on retail foods.

Microbial Genomics


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Dziegiel A, Duong VT, Bloomfield SJ, Thomson NR, Maskell DJ, Wain J, Janecko N, Baker S, Mather AE. (2025)

Metagenomic identification of disease-causing Salmonella enterica serovars and antimicrobial resistance genes from paediatric faecal samples

Microbial Genomics


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Yap M, Zamudio R, Bloomfield S, Palau R, Janecko N, Mather A. (2025)

Genomics uncover resistant and virulent Klebsiella on foods: a potential risk to human health

Food Microbiology


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Bloomfield S, Palau P, Janecko N, Baker-Austin C, Mather AE. (2025)

Association of antimicrobial resistant Vibrio and species pathogenic to humans with aquacultured seafood

Food Microbiology


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Bloomfield S, Hildebrand F, Zomer AL, Palau R, Mather AE. (2025)

Ecological insights into the microbiology of food using metagenomics and its potential surveillance applications

Microbial Genomics, 11, 1


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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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Dziegiel AH, Bloomfield SJ, Savva GM, Palau R, Janecko N, Wain J, Mather AE. (2024)

High Campylobacter diversity in retail chicken epidemiologically important strains may be missed with current sampling methods

Epidemiology and Infection


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