Mass Antibiotic Treatment for Group A Streptococcus Outbreaks in Two Long-Term Care Facilities1
Andrea Smith*†, Aimin Li‡, Ornella Tolomeo*, Gregory J. Tyrell§†, Frances Jamieson‡, and David Fisman*¶
Author affiliations: *City of Hamilton Social and Public Health Services Department, Hamilton, Ontario, Canada; †University of Alberta, Edmonton, Alberta; ‡Canada Ontario Ministry of Health and Long-Term Care, Toronto, Ontario, Canada; §Provincial Laboratory for Public Health, Edmonton, Alberta, Canada; ¶McMaster University, Hamilton, Ontario, Canada
Figure 3. Timeline for outbreak 2. Solid lines represent the time of onset and duration of illness among three cases with invasive GAS infection in outbreak 2, relative to the initiation of the outbreak investigation (date=0). Daggers (†) denote death. Mass antibiotic treatment was started 2 days after the investigation was initiated.
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