this is what I found upon Googling, SFA...
"Sydenham chorea is caused by an infection with bacteria called group A streptococcus. This is the bacteria that cause rheumatic fever (RF) and strep throat. Group A streptococcus bacteria can react with a part of the brain called basal ganglia to cause this disorder."
Sx usually resolve w/in 3 weeks to 6 months, can be permanent heart damage.