(biology) taxonomic group whose members can interbreed

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

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)

a species of aerobic bacteria

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

the bacteria that produce crown gall disease in plants

the species of bacteria that causes granuloma inguinale

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