RESUMEN
The purpose of this experiment was to estimate the influence of nonspecific immunostimulation of pregnant sows on the immunological value of colostrum. The studies were done in the fall-winter season on 20 pregnant sows (Polish Landrace) divided into four groups, five animals each. The sows were clinically healthy and unvaccinated. Group I received isoprinosine, group II (TFX), group III (HMB), and group IV served a control. The immunostimulants were applicated 4-6 weeks before the expected date of delivery. The following parameters were determined in colostrum taken from sows after completed delivery: specific gravidity; total proteins, lysozyme activity, IgG level. It was found that the nonspecific immunostimulation of pregnant sows increased in colostrum the level of IgG, total protein content and lysozyme activity.