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Disclaimer: Early release articles are not considered as final versions. Any changes will be reflected in the online version in the month the article is officially released.

Volume 32, Number 10—October 2026

Research

Wastewater Surveillance to Track Resurgent Measles Outbreak, Ontario, Canada, 2025

Ryland Corchis-ScottComments to Author , Élisabeth Mercier, Edgard M. Mejia, Qiudi Geng, Ethan Harrop, Ana Podadera, Jackie Fong, Natalie Lewoc, Kenneth K.S. Ng, Nataliya Santiago, Natalie Knox, Lawrence Goodridge, Chand S. Mangat, Chrystal Landgraff, Karen B. Riddell, Mehdi Aloosh, Robert Delatolla, and R. Michael McKay
Author affiliation: University of Windsor, Windsor, Ontario, Canada (R. Corchis-Scott, Q. Geng, E. Harrop, A. Podadera, J. Fong, K.K.S. Ng, R.M. McKay); University of Ottawa, Ottawa, Ontario, Canada (É. Mercier, R. Delatolla); National Microbiology Laboratory, Winnipeg, Manitoba, Canada (E.M. Mejia, N. Santiago, N. Knox, C.S. Mangat, C. Landgraff); Windsor Essex County Health Unit, Windsor (N. Lewoc, M. Aloosh); University of Guelph, Guelph, Ontario, Canada (L. Goodridge); Windsor Regional Hospital, Windsor (K.B. Riddell); McMaster University, Hamilton, Ontario, Canada (M. Aloosh)

Main Article

Figure 3

MeV wastewater surveillance signal and clinical case counts in Leamington, Ontario, outbreak, 2025. Clinical cases (blue bars) are compared against (A) raw MeV RNA concentrations (copies/mL; red points/line) and (B) MeV RNA concentrations normalized to PMMoV (red points/line). Data are aggregated by epidemiologic week; wastewater values represent weekly mean (points) + SE. MeV, measles virus; PMMoV, pepper mild mottle virus.

Figure 3. MeV wastewater surveillance signal and clinical case counts in Leamington, Ontario, outbreak, 2025. Clinical cases (blue bars) are compared against (A) raw MeV RNA concentrations (copies/mL; red points/line) and (B) MeV RNA concentrations normalized to PMMoV (red points/line). Data are aggregated by epidemiologic week; wastewater values represent weekly mean (points) + SE. MeV, measles virus; PMMoV, pepper mild mottle virus.

Main Article

Page created: July 01, 2026
Page updated: September 22, 2026
Page reviewed: September 22, 2026
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