Current data on the cloning of virulence factors of pathogenic Streptococci

The data on the cloning of the main pathogenic determinants of group A streptococci including M-protein, erythrogenic toxin, streptokinase, streptolysin O are analyzed. The scientific importance and the possible ways to use the data obtained after cloning are discussed. The hypothesis on the operon system of a number of streptococcal virulence factors regulation is discussed. Construction of vector systems for streptococcal genes cloning is summarized.