"bacteria"

Students determine contamination levels of ground beef in different environments.

Everything you need to safetly collect and culture bacteria and fungi from your environment

Hemolysis, the rupture of red blood cells, is induced by certain species of streptococcal bacteria that produce extracellular hemolysin.  Observe this phenomenon with this set of 3 non-pathogenic species

Escherichia coli - Lactose neg

Grows on dead tissues. Novobiocin resistant (S. epidermidis and S. aureus novobiocin sensitive). 

Isolated from human nasopharynx. Presumably not related to N. sicca; some relation to N. gonorrhoeae. Often agglutinates in saline. 

Isolated from human saliva, sputum, and intestine. No Lancefield group shown, alpha hemolysis.

Produces orange pigments. 

Normal flora of respiratory tract. Beta-lactamase positive. Also known by the name Branhamella catarrhalis

This yellow, shiny organism is known to cause wound infections and more famously, toxic shock syndrome.