Changes in Parameters of Fresh and Deconserved Sperm of Stallions after Their Vaccination against Anthrax

Resumo

The aim of this work was to estimate the effect of vaccinating stallions against anthrax on the sperm quality and its criostability. Vaccination of stallions against anthrax led to a decrease in the sperm quality. During the first week after vaccination, the sperm productivity decreased by 10%. In freshly diluted sperm, the sperm motility decreased by 12%, survival by 38% (Р > 0.99), and membrane integrity by 20% (Р > 0.95) on average. Their recovery was observed not earlier than 28 days after vaccination. Vaccination had an especially strong effect on sperm quality after cryopreservation: sperm motility decreased by 35% (P > 0.99), survival by 45% (P > 0.99), and membrane integrity by 46% (P > 0.99) on average, and these parameters remained low for 1 month. Rejection of sperm doses in the postvaccination period was 50% because of the decrease in quality below the standard level. The amount of pathological types of sperm increased 45 days after vaccination: by 27% (Р > 0.95) in fresh sperm and 34% (Р > 0.99) in deconserved sperm. In the case of cryoconservation of stallions' sperm, it is necessary to take into account the recovery period after antiepizootic measures.