H. pylori, Heliobacter pylori - the type species of genus Heliobacter; produces urease and is associated with several gastroduodenal diseases (including gastritis and gastric ulcers and duodenal ulcers and other peptic ulcers)

Pseudomonas pyocanea - a species of aerobic bacteria

Aerobacter aerogenes - a species of Gram-negative aerobic bacteria that produce gas and acid from sugars and are sometimes involved in the souring of milk

Agrobacterium tumefaciens - the bacteria that produce crown gall disease in plants

division Eubacteria - one-celled monerans having simple cells with rigid walls and (in motile types) flagella

Calymmatobacterium granulomatis - the species of bacteria that causes granuloma inguinale

Francisella tularensis - the type species of the genus Francisella and the causal agent of tularemia in humans; can be used as a bioweapon

Serratia marcescens - the type species of the genus Serratia; a species found in water and soil and milk and foods and insects; can cause infections of the endocardium and blood and wounds and urinary tract and respiratory tract; has been tested as a bioweapon

Streptococcus anhemolyticus - a species of bacteria

species - (biology) taxonomic group whose members can interbreed