SPIROVAC

For active immunisation of cattle to reduce kidney colonisation and shedding of Leptospira borgpetersenii serovar Hardjo type hardjobovis to the extent that no viable organisms can be detected by culture in the urine of vaccinated animals after challenge; a 3 weeks onset of immunity and 12 months duration of protectionhave been demonstrated by challenge with Leptospira borgpetersenii serovar Hardjo type hardjobovis.

For active immunisation of cattle persistently infected with Leptospira borgpetersenii serovar Hardjo type hardjobovis: to reduce urinary shedding of Leptospira borgpeterseni.