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Volume 9, Number 10—October 2003

Research

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*¶Comments to Author 
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

Main Article

Figure 4

Molecular epidemiology of group A streptococcal strains in outbreak 2. Pulsed-field gel electrophoresis, demonstrating relatedness of group A streptococcal isolates from facility staff and residents. Lanes 1 and 7 contain an ATCC quality control strain. Solid arrows denote identical strains from two of the three persons in whom fatal invasive group A streptococcal infection developed; the third person with invasive disease had an electrophoretically identical strain (not shown). Hollow arrows de

Figure 4. Molecular epidemiology of group A streptococcal strains in outbreak 2. Pulsed-field gel electrophoresis, demonstrating relatedness of group A streptococcal isolates from facility staff and residents. Lanes 1 and 7 contain an ATCC quality control strain. Solid arrows denote identical strains from two of the three persons in whom fatal invasive group A streptococcal infection developed; the third person with invasive disease had an electrophoretically identical strain (not shown). Hollow arrows denote identical strains from persons with asymptomatic colonization with group A streptococcus. Brackets denote duplicate strains from the same person; asterisk denotes staff member.

Main Article

1Presented in part at the 12th Annual Scientific Meeting of the Society for Healthcare Epidemiology of America (SHEA), April 6–9, 2002, Salt Lake City, Utah.

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