Antistreptolysin O (ASO) Antibodies
Collect SST, after 30 minutes of clotting, promptly centrifuge and send 2.0 mL serum.
Alternate Sample: Red top
Room temp: 14 days, Refrigerated: 14 days, Frozen: 14 days
Document exposure to streptococcal streptolysin O. A marked rise in titer or a persistently elevated titer indicates that a Streptococcus infection or poststreptococcal sequelae are present.