leptospira fainei leptospira fainei leptospira fainei is a pathogenic species of leptospira, first isolated from pigs in australia and named for university of otago and monash university microbiologist dr. solomon faine. leptospira fainei scientific classification domain: bacteria phylum: spirochaetota class: spirochaetia order: leptospirales family: leptospiraceae genus: leptospira species: l. fainei binomial name leptospira faineiperolat et al. 1998