Assertion: beta hemolysis | /r/CreatedBy | two hemolysins o
Facets:
Source sentences:
text: Beta hemolysis is caused by two hemolysins O and S; the former is inactive in the presence of oxygen.
text: Beta hemolysis is caused by two hemolysins O and S where hemolysin O is oxygen liable (inactive in the presence of oxygen) and hemolysin S is oxygen stable cytotoxin.