Vaccine against leptospirosis in horses

Concentrated vaccine against leptospirosis in horses is used for the prevention of leptospirosis caused by leptospira pomona, tarassovi, grippotyphosa, canicola and icterohaemorrhagiae. The vaccine is a transparent colourless liquid containing greyish white precipitate that suspends easily upon shaking.

The vaccine is prepared from inactivated cloned strains of leptospira pomona, tarassovi, grippotyphosa, canicola and icterohaemorrhagia.

The vaccine is used in leptospirosis-affected farm units, in animals pastured at a natural focus of leptospirosis or upon detection of animals seropositive for leptospirosis by microhaemagglutination test.

All clinically healthy animals should be subject to vaccination.

The vaccine produces active Immunity to leptospirosis, which develops 2 to 3 weeks after immunization and lasts 6 to 8 months in young animals and 12 to 15 months in adult animals.

Vaccination prevents clinical appearances of leptospirosis such as abortion, leptospira-carrying and formation of intensive foci of leptospirosis.

Vials/ampoules must be shaken before use to maintain the homogeneity of the suspension and avoid precipitation of the vaccine's components.

Horses are vaccinated at the age of 1,5 months and upwards. The vaccine is administered singly via intramuscular route at the following doses:

Animals aged below 12 months: 1,0 cm³;

Adult animals: 2,0 cm³.

Animals aged below 12 months: after 6 months.

Adult animals: after 12 months.

To prevent abortion and leptospirous etiology, mares are vaccinated during the first third of pregnancy. To produce colostral Immunity in young animals, it is recommended to vaccinate in-foal mares 1,5 to 3 months before birth.

Mares should not undergo vaccination during the last month of pregnancy and one week after birth. Animals should not be subject to vaccination 7 days after dehelminthization or 14 days after treatment with chlorine- or phosphorus-containing products.

The vaccine is available in vials containing 1 to 5 doses.

12 months if kept in a dark dry place at a temperature between 2 and 10^oC.