A bacterium causing abortion in pregnant females and sickness in calves. The five varieties include: hardjo, icterohaemorrhagiae, canicola, pomona, and grippotyphosa. Breeding animals should be vaccinated with a 5-way Lepto vaccine at least once a year before the breeding season. Booster vaccination later in the year is recommended. Leptospirosis vaccine is often combined with Vibriosis vaccine.