<prompt> Leptospira is aVirusFungusSpirocheteRickettsiae  <response>: Ans. c Spirochete. Ref. Harrison, Chap. 171LEPTOSPIROSIS Leptospira is a spirochetal organism causing leptospirosis or Weils disease. It is characterized by renal failure, jaundice and fever. It disappears from blood after 1st week, blood examination is helpful only in early stages. EMJH media can be used to cultivate them. Microscopic agglutination is specific for it, but done in reference labs. Immunofluroscence has no role. 