MicroVision
	STREPTOCOCCUS
	Bacteria in the genus Streptococcus are Gram-positive cocci that arrange themselves in chains. They are shown in here at 1000 X magnification in a Gram stain. Pathogenic Streptococcus include Streptococcus pyogenes, the cause of "Strep throat", and Streptococcus pneumoniae, which, as its name suggests, may cause pneumonia. Streptococcus lactis is a nonpathogen that is used in food production. Species of Streptococcus are differentiated by biochemical tests, not by their appearance on a Gram stain. Click on each image to see the enlarged version. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
	© 1998