Strep, group A
A well-known strain (a type) of streptococcus (strep) bacteria that can cause strep throat and common skin problems such as impetigo as well as rheumatic fever.
Autoimmune reactions to strep have also recently been associated with a number of disorders, including guttate psoriasis (cradle cap), Sydenham's chorea (a movement disorder related to rheumatic fever), obsessive-compulsive disorder, Tourette syndrome, autism, and anorexia nervosa.
Group A strep are also known popularly as flesh-eating bacteria.