microvirga zambiensis microvirga zambiensis microvirga zambiensis is a gram-negative, nitrogen-fixing, rod-shaped and non-spore-forming bacteria from the genus of microvirga. microvirga zambiensis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: methylobacteriaceae genus: microvirga species: m. zambiensis binomial name microvirga zambiensisardley et al. 2012 type strain cb 1298, hambi 3238, lmg 26454, willems r-41059, wsm3693