Biological characteristics and whole-genome sequencing analysis of an alpha-hemolytic Streptococcus pyogenes strain
This study characterizes an atypical alpha-hemolytic *Streptococcus pyogenes* strain (ST176/emm58.7) isolated from erysipelas, identifying a *sagB* gene mutation as the cause of its unusual hemolysis while confirming it retains significant virulence factors and macrolide/tetracycline resistance, thereby highlighting the risk of clinical underdetection for such phenotypically deviant pathogens.