Explanation:

A blood clot that forms inside a blood vessel can be deadly because it blocks the flow of blood, cutting off the supply of oxygen. Streptokinase streptococcus is used for removal of clothing in blood vessels of the human heart.
Streptococcal bacteria use an enzyme called streptokinase to block the blood clotting response and allow themselves to move more freely around the human host's circulatory system.