Prevalence and Genetic Characterization of Pertactin-Deficient Bordetella pertussis in Japan (original) (raw)
Figure 4
Geographical distribution of Prn− isolates in Japan during 2001–2009.
Blue and red circles indicate Prn− isolates harboring prn1_ΔSS and prn1::IS_481, respectively. Numbers of isolates tested are indicated in parentheses.