Abstract: Methods for stimulating immune responses in a bovine animal susceptible to infection by Leptospira hardjo-bovis are disclosed. In the methods, a composition of inactivated L. hardjo-bovis and an adjuvant is administered to the animal within about 4 weeks of birth. The immune responses stimulated in the animal prevent or shorten the duration of a subsequent L. hardjo-bovis infection. The immune response is effective for at least a year.

Abstract: Methods for stimulating immune responses in a bovine animal susceptible to infection by Leptospira hardjo-bovis are disclosed. In the methods, a composition of inactivated L. hardjo-bovis and an adjuvant is administered to the animal within about 4 weeks of birth. The immune responses stimulated in the animal prevent or shorten the duration of a subsequent L. hardjo-bovis infection. The immune response is effective for at least a year.

Abstract: A bow sight of the type having a pin guard that surrounds the sighting pins is fitted with a cover assembly. A protective cap can be moved between a closed position to protect the sight pins, and an open position in which the cap is out of the sight picture. The cover assembly can have a base that fits onto the distal side of the bow sight, with the cap being hinged to the cover on the riser side of a circular aperture through the base. The bow sight may have a built-in receptacle to attach the hinge of a cap. Also, the cap may have a transparent window for sighting with the cap in the closed position. The window may be clear, or may be an optical filter or a lens. A spring can bias the cap to the open position.