Emerging Infectious Disease ISSN: 1080-6059

Changes in Predominance and Diversity of Genomic Subtypes of Bordetella pertussis Isolated in the United States, 1935 to 1999

Terri Hawes Hardwick, Pamela Cassiday, Robbin S. Weyant, Kristine M. Bisgard, and Gary N. Sanden

Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA;

Figure 2

Temporal distribution of 105 pulsed-field gel electrophoresis profiles of Bordetella pertussis strains isolated in the United States, 1935 to 1999.

Figure 2. Temporal distribution of 105 pulsed-field gel electrophoresis profiles of Bordetella pertussis strains isolated in the United States, 1935 to 1999.

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