Specimens

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

This pathogenic organism is sometimes isolated from hay and grass.

This filamentous cyanobacteria is comprised of heterocysts and akinetes that are terminally located on the filament.

Students determine contamination levels of ground beef in different environments.

Isolated from the alimentary tract of cows. Lancefield group D, gamma hemolysis. May be pathogenic in humans. 

Eschericia coli culture that produces GFP, visible in the presence of UV light.

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

Frequent human isolate. Causes gastroenteritis.

Capsules produced in milk. Psychrophilic (prefers low temperatures), produces yellow pigments. 

All microbial cultures undergo an extensive quality control program prior to releasing for sale, so they are guaranteed for purity as well as for species.