Click to enlargeSpirovac Hardjo


Infection with L. borgpetersenii serovar hardjo (type hardjo-bovis), previously classified as Leptospira interrogans serovar hardjo, is the primary cause of leptospirosis of cattle in the United States1-2 and in much of the world.3 L. borgpetersenii serovar hardjo is also an important zoonotic disease causing a flu-like syndrome in humans and is recognized as an important occupational disease in many industrial countries.3 Cattle are the primary reservoir for L. borgpetersenii serovar hardjo, resulting in maintenance infections that are often chronic and subclinical in nature but that can cause economic loss to cow-calf and dairy operations.4


1. General Directions: Vaccination of healthy cattle is recommended. Shake well. Aseptically administer 2 mL subcutaneously. In accordance with Beef Quality Assurance guidelines, this product should be administered subcutaneously (under the skin) in the neck. 2. Primary Vaccination: Healthy cattle should receive 2 doses administered 4-6 weeks apart. When used as an aid in preventing fetal infection, administer the second dose at least 2 weeks prior to breeding. 3. Revaccination: Annual revaccination with a single dose is recommended. 4. Good animal husbandry and herd health management practices should be employed. Call toll free 1-800-892-6978 or email us at


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