Rank: Species
Lineage: Bacteria;Spirochaetes;Spirochaetia;unclassified;Leptospiraceae;Leptospira;Leptospira interrogans
Description: Leptospira interrogans is a Gram negative, obligate aerobe spirochete, with periplasmic flagella. When viewed through a light microscope, it often resembles a question mark, and this gives the species its name. It is a member of the genus Leptospira. Some important pathogenic serovars from this species are Canicola, Icterohaemorrhagiae and Australis. L. interrogans is difficult to culture, requiring special media and extended incubation periods.
Reference Material:
https://en.wikipedia.org/wiki/Leptospira_interrogans