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Marie Claire Arrieta
- Associate professor, Cumming School of Medicine, University of Calgary
- Invited member of the Royal Society of Canada, College of New Scholars, Artists, and Scientists in November 2023
- UCalgary Research Excellence Chair in June 2023
- Killam Emerging Research Leader Awardee in October 2020
- New Investigator Award, SickKids Foundation and CIHR in November 2018
- Part of the Top 40 under 40, Avenue Magazine, Calgary in November 2017
- Her research program examines the interactions between the early-life gut microbiome and the infant’s immune, metabolic and neurological development. Her research group also examines the causality and mechanisms of these associations in mouse models of inflammation
- First or senior author for works published in leading journals such as Gut, Science Translational Medicine, Cell Host and Microbe and Nature Communications
- Author of the best-selling public book, Let Them Eat Dirt, and is involved in several science communication initiatives within Canada and abroad, including public talks, international medical education and a documentary film project to advocate science communication to the public
Articles from this author

Microbiome maturation trajectory and key milestones in early life
Marie Claire Arrieta
Microbiome maturation trajectory and key milestones in early life
Videos from this author

The bloom of microbes and immune development in early life
Marie Claire Arrieta
The bloom of microbes and immune development in early life