Blood-parasitic diseases of cattle are widespread in all regions of the republic and cause great damage to the development of animal husbandry. As a result of late treatment-prophylactic measures among infected animals, the mortality rate is 40-70%. In particular, the breeds imported from foreign countries are more resistant to blood-parasitic diseases, if timely measures are not taken, breeders may face losses. Carriers of blood-parasitic diseases of cattle, especially the causative agents of piroplasmosis and francsaiellosis, are pasture ticks. Animals get sick with piroplasmosis and francaisellosis three times a year. The first infection period of the disease occurs in spring (April-May), the second period in summer (June-July), and the third period in autumn (September-October). These periods of disease of animals depend on the period of activation of pasture ticks, which are disease carriers. Mass infection of cattle with blood-parasitic diseases occurs when animals are kept in grazing conditions in farms. However, it should also be noted that blood-parasitic diseases occur among animals kept in stable conditions. This situation is related to the introduction of pasture ticks into the farm during the bringing of fresh grass for the farm, changing of different domestic animals and similar situations.