"The Mystery of Lyle and Louise"

This non-pathogenic strain of E. coli was initially created for cloning use.

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

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

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