Rabbit anti-Bacteria SPEA polyclonal antibody for ELISA. Suitable for use in ELISA. Each laboratory should determine an optimum working titer for use in its particular application. Other applications have not been tested but use in such assays should not necessarily be excluded.Streptococcal Pyrogenic Exotoxin A (SpeA) is a causative agent of the symptoms associated with scarlet fever, has been associated with streptococcal toxic shock-like disease and may play a role in the early events of rheumatic fever.