Personal profile
Research interests
Our work is focused on the intensive study of the host, most particularly the child, and the host's intestinal microbiota in health and disease. We study diverse aspects of this interaction, including specific pathogens (especially diarrheagenic E. coli such as E. coli O157:H7), and human microbial communities, such as in inflammatory bowel diseases like Crohns Disease and ulcerative colitis.
Clinical interests
Gastrointestinal diseases, e coli, infectious diseases, nutrition, food safety
Available to Mentor:
- PhD Students
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Collaborations and top research areas from the last five years
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A randomized controlled trial to unveil the influence of an exercise intervention on brain integrity and gut microbiome structure in individuals with HIV
Cooley, S. A., Ferreiro, A., Nelson, B., Sukhum, K., Westerhaus, E., Petersen, K., Fox, J. R., Rosenow, A., Sorensen, C., Vaida, F., Reeds, D. N., Tarr, P. I., Dantas, G. & Ances, B. M., 2026, In: AIDS. Publish Ahead of PrintResearch output: Contribution to journal › Article › peer-review
1 Link opens in a new tab Scopus citations -
Clostridioides difficile Colonization and Infection in Pediatric Oncology and Stem Cell Transplant Patients
Willis, D. N., Dubberke, E. R., Hayashi, R. J., Tarr, P. I., Haslam, D. B., Hink, T., Luo, J., Tao, Y., Padhye, A., Hall, E. M. & Storch, G. A., Apr 2026, In: Open Forum Infectious Diseases. 13, 4Research output: Contribution to journal › Article › peer-review
Open Access -
Shiga Toxin–Producing Escherichia coli Outbreak in Canadian Daycare Centers
Eltorki, M., Ajayi, O. O., Seok, J., Xie, J., Rizzuti, F. A., Berenger, B. M., Tarr, P. I., Pavia, A. T., Snedeker, K., Grisaru, S., Vanderkooi, O. G., Chui, L., Tarr, G. A. M., Vomiero, G. & Freedman, S. B., 2026, In: JAMA Network Open. 9, 3, e261278.Research output: Contribution to journal › Article › peer-review
Open Access -
An Evaluation of Enteropathogen-Specific Disease Severity and Duration in Children With Acute Gastroenteritis
On behalf of Pediatric Emergency Research Canada (PERC) and the Pediatric Emergency Care Applied Research Network (PECARN), Dec 2025, In: Pediatric emergency care. 41, 12, p. 935-943 9 p.Research output: Contribution to journal › Article › peer-review
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Colonic goblet cell-associated antigen passages mediate physiologic and beneficial translocation of live gut bacteria in preweaning mice
Udayan, S., Floyd, A. N., John, V., Barrios, B. E., Rusconi, B. A., McDonald, K. G., Schill, E. M., Kulkarni, D. H., Martin, A. L., Gutierrez, R., Talati, K. B., Harris, D. L., Sundas, S., Burgess, K. M., Pauta, J. T., Joyce, E. L., Wang, J. D., Wilson, L. D., Knoop, K. A. & Tarr, P. I. & 2 others, , Apr 2025, In: Nature microbiology. 10, 4, p. 927-938 12 p., 102356.Research output: Contribution to journal › Article › peer-review
Open Access3 Link opens in a new tab Scopus citations