Figure 1.

emm types identified in pharyngitis and invasive Group A Streptococcus isolates, Colorado, June 2016 to April 2017. (A) Number of isolates recovered from each month of the study period. (B) Number of isolates for each of the emm types identified. (C) Each point represents an emm type for which the x- and y-axis values indicate the proportion of invasive and pharyngitis isolates belonging to the emm type, respectively. The dotted line indicates where the 2 proportions are equal. Text labels under points are the emm types. emm types 49, 82, 92, and 76 (red) were significantly more common in invasive isolates, whereas emm types 4, 12, 3, 6, and 87 (blue) were significantly more common in pharyngitis isolates. (D) The same as (C) except that 57 invasive isolates that were recovered from people who injected drugs or who experienced homeless were removed.