Group C[edit]
This group includes S. equi, which causes strangles in horses,[12] and S. zooepidemicus—S. equi is a clonal descendent or biovar of the ancestral S. zooepidemicus—which causes infections in several species of mammals, including cattle and horses. S. dysgalactiae is also a member of group C, β-haemolytic streptococci that can cause pharyngitis and other pyogenic infections similar to group A streptococci.