kaistia hirudinis kaistia hirudinis kaistia hirudinis is a gram-negative and rod-shaped bacterium from the genus of kaistia which has been isolated from a leech (hirudo verbana) from the leech breeding station in biebertal in germany. kaistia hirudinis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: kaistiaceae genus: kaistia species: k. hirudinis binomial name kaistia hirudinisglaeser et al. 2013 type strain ccm 8401, cip 110381, e94, lmg 26925