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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 6—June 2026

Synopsis

Group A Streptococcus Disease Outbreak Associated with Large Congregate Shelter, Chicago, Illinois, USA, October 2023–January 2024

Karrie-Ann Toews1, Lauren Tietje, Anne Meyers, Marco Ciaccio, Stephanie Gretsch, Alyse Kittner, Kendall Anderson, Matthew Bertagna, Elizabeth S. Davis, Stockton Mayer, Rebecca M. Singer, Margaret Mary Butler, Diana Arce-Garza, Thomas D. Huggett, Ryan Fabrizius, Jennifer Levy, Stephanie Black, Sopio Chochua, Christopher J. Gregory, and Michelle Funk1Comments to Author 
Author affiliation: Chicago Department of Public Health, Chicago, Illinois, USA (K.-A. Toews, L. Tietje, A. Meyers, M. Ciaccio, S. Gretsch, A. Kittner, K. Anderson, M. Bertagna, J. Levy, S. Black, M. Funk); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (K.-A. Toews, S. Chochua, C.J. Gregory); Rush University Medical Center, Chicago (E.S. Davis, M.M. Butler); University of Illinois Chicago, Chicago (S. Mayer, R.M. Singer, D. Arce-Garza); Lawndale Christian Health Center, Chicago (T.D. Huggett, R. Fabrizius)

Main Article

Figure 1

Epidemiologic curve for GAS cases in shelter A, by year and epidemiologic week, Chicago, Illinois, USA, October 25, 2023–January 3, 2024. Vertical dashed lines indicate key response activities. Suspect cases were identified clinically, without rapid or laboratory testing. Suspect cases identified clinically without rapid or laboratory testing. GAS, group A Streptococcus; iGAS, invasive GAS; IPC, infection prevention and control.

Figure 1. Epidemiologic curve for GAS cases in shelter A, by year and epidemiologic week, Chicago, Illinois, USA, October 25, 2023–January 3, 2024. Vertical dashed lines indicate key response activities. Suspect cases were identified clinically, without rapid or laboratory testing. Suspect cases identified clinically without rapid or laboratory testing. GAS, group A Streptococcus; iGAS, invasive GAS; IPC, infection prevention and control.

Main Article

1These authors contributed equally to this article.

Page created: April 20, 2026
Page updated: May 15, 2026
Page reviewed: May 15, 2026
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