S.<unk>  is a catalase-negative and oxidase-negative, nonmotile, non-sporulating, Gram-positive lactic acid bacterium that grows as pairs or chains of cocci. It is a member of the Lancefield group D streptococci. Most strains are gamma-hemolytic (non-hemolytic), but some also display alpha-hemolytic activity on sheep blood agar plates. Strep<unk>  is a non-enterococci.
Streptococcus bovis
Staphylococcus aureus
Bacillus anthracis
Streptococcus pyogenes
Rhodococcus equi
Corynebacterium diphtheriae
Neisseria flavescens
Pseudomonas aeruginosa