sneathia sneathia sneathia is a gram-negative, rod-shaped, non-spore-forming and non-motile genus of bacteria from the family of leptotrichiaceae. species have been identified as pathogens associated with bacterial vaginosis. sneathia scientific classification domain: bacteria phylum: fusobacteriota class: fusobacteriia subclass: fusobacteriales order: fusobacteriales family: leptotrichiaceae genus: sneathiacollins et al. 2002 type species sneathia sanguinegens species s. sanguinegens s. amnii sneathia is named of the microbiologist h. a. snaeth.