CC	clonal complex
CG	clonal group
GBS	Group B Streptococcus
GEI	genomic islands
GWAS	genome-wide association study
MGE	mobile genetic elements
ML	maximum likelihood
MLST	multilocus sequence-typing
NT	non-typeable
PICI	phage-inducible chromosomal islands
SL	sublineage
ST	sequence type
TcR	tetracycline resistance