|Description:||Under a high magnification of 20,000X, this colorized scanning electron micrograph (SEM) revealed a small clustered group of Gram-positive, beta-hemolytic Group C Streptococcus sp. bacteria. See PHIL 10585 for a black and white version of this image.|
The genus Streptococcus is comprised of microaerophilic cocci (round), which are not motile and occur in chains or pairs. The genus is defined by a combination of antigenic, hemolytic, and physiological characteristics into Groups A, B, C, D, F, and G. Groups A and D can be transmitted to humans via food.