Goat Anti-S. pyogenes Group A Carbohydrate Polyclonal antibody for Dot, ELISA, ICC/IF, IHC-Fr, IP, WB. Streptococcus pyogenes is a Gram-positive, nonmotile, nonsporeforming coccus that occurs in chains or in pairs of cells. Individual cells are round-to-ovoid cocci, 0.6-1.0 micrometer in diameter. Streptococci divide in one plane and thus occur in pairs or