Relationships between emm and multilocus sequence types within a global collection of Streptococcus pyogenes

BMC Microbiology

Table 5 emm types associated with distant STs.

emm pattern	No. of emm types examined *	No. of emm types involved in HGT	No. of HGT events involving emm type	Average no. of HGT events per emm type	Average no. of isolates sampled per emm type	Average no. of countries sampled per emm type	No. of HGT events involving the same emm allele	No. of emm types restricted to 1 ST or CC
A-C	18	3	3	0.17	7.94	2.78	2	14
D	40	19^	24^	0.60	3.90	2.18	15	15
E	44	27	33	0.75	5.09	2.28	15	12
other	3	3	3	1.00	2.67	1.67	0	0
Total	105	52	63	n/a	n/a	n/a	32	41

* emm types examined are those whereby 2 or more isolates are present in the sample set (i.e., sample set of 531 isolates, excluding the 51 singletons).
^ One emm type (emm93) may not be involved in HGT based on identification of an intermediate ST in another study [49]
Abbreviations: n/a, applicable; CC, clonal complex; HGT, horizontal gene transfer; ST, sequence type

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