Matière vivante, Bactéries

This organism is commonly isolated in soil and produces antibiotics such as bacitracin, subtilisin, and mycobacillin.

This species of Rhodospirillum is commonly isolated from stagnant water and mud. It is especially interesting because it produces a red pigment and is also capable of photosynthesis.

This organism is commonly isolated from soil, and depending upon the temperature of its environment, can produce a distinctive red pigment.

This organism is often times isolated from food; in large amounts it can cause food poisoning

This organism is a common environmental isolate, and can be found in soil as well as in industrial settings.

Oscillatoria is a genus of filamentous green algae that moves by sliding filaments back and forth against each other.

Isolated from soil. Forms red pigment (best on high carbohydrate medium) and has oval eccentric spores. 

Colorless, most widely dispersed of the Serratia species. 

This spore-forming, thermophilic organism is commonly used for germicidal and sporicidal testing due to its ability to withstand higher-than-normal temperatures.

Noted for capsular swelling. Causes pneumonia and urinary tract infections.

Isolated from human intestine, this organism is known for its distinctive putrefactive odor.

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

Isolated from sewage, human intestines, and urinary tract infections. Spreading colonies are seen on agar growth medium. 

Both of these strains of Serratia marcescens are colorless mutants when plated alone, but when grown together, they produce a red pigment.

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.

Beta hemolysis on blood. Causes wound infections and septicemia.