Streptococci 插畫檔

Microscopic visualization of streptococcus bacteria. Streptococcus is a spherical or ovoid chiefly nonmotile and parasitic gram-positive bacteria that divide only in one plane, occur in pairs or chains, and include important pathogens of humans and domestic animals. Examples include Streptococcus pneumoniae, Streptococcus mutans, Streptococcus viridans and Streptococcus pyogenes.