ABSTRACT
Streptolysin S (SLS),one of the important virulence factors of Streptococcus,exist in several kinds of human and animal pathogenic bacterial,including Streptococcus pyogenes,Strepstococcus iniae and Streptococcus anginosus.SLS is a peptide toxin encoded by nine consecutive genes (sagA-sagⅠ).The functions of SLS include contributing pathogenic bacterium to pass through epithelial barrier,causing tissue damage,resisting to phagocytic clearance of host immune cells and interacting with other virulence factors.In addition,SLS as a signaling molecule of cell quorum sensing is involved in regulating the expression with other virulence factors.This paper summarized the structures and the biological functions of SLS in Streptococcus infection.
ABSTRACT
Objective To investigate the relationship between blood pressure and electrocardiogram (ECG) findings in patients with differents ages and sex.Methods Blood pressure and clinical electrocardiogram findings were statistically analyzed in 1 268 patients ≥60 years old and 1 276