treponema azotonutricium treponema azotonutricium treponema azotonutricium is a bacterium, the first termite gut spirochete to be isolated, together with treponema primitia. treponema azotonutricium scientific classification domain: bacteria phylum: spirochaetota class: spirochaetia order: spirochaetales family: treponemataceae genus: treponema species: t. azotonutricium binomial name treponema azotonutriciumgraber et al. 2004