Dynamics of blood immunological indicators in the period of the reproductive cycle under different technologies of keeping

Abstract

The obtained results of search on the influence of technology and conditions of sows holding of different physiological states on immunological parameters indicate that that the content of T-lymphocytes in the blank and sows of the first half of fertility in both farms was very high and exceeded the upper limit of physiological norm by 1–3% on average. However, with the onset of the second half of fertility and lactation in sows, a decrease in its level, fluctuating within the limits of the physiological norm (49.12%–51.37%), was noted. The content of T-helper cells in sows of all physiological groups of both farms was within the limits of the physiological norm. The difference between the indicators was the highest in sows of the second half of fertility – 8%, in favor of sows from the farm of the Staryi Sambir district. In other groups of sows the T-helper's content varied from 0.12% to 1.7%, with the overwhelming majority in favor of sows from the Zolochiv district. In fact, the same percentages were the indexes of the contents of T-suppressors of blank and sows of the first half of the fertility of both farms. In the sows of the second half of fertility, the difference between the indicators of this population of lymphocytes was 3.37%, the predominantly higher rate was observed in sows from the farm of the Zolochiv district. In lactating sows, the difference in rates was significantly lower, only 0.88%, with a tendency for growth in animals from the Staryi Sambir district. An analysis of the level of humoral protection of the sow's blood of reproduction period showed, that in all physiological groups, except lactating, the content of B-lymphocytes was on average 0.38% – 0.95% higher was in sows from the farm of Zolochiv district. In lactating animals, the level of these lymphocytes was 3.75% higher in females from the economy of the Staryi Sambir district. The immunoregulatory index in almost all animal groups exceeded the upper limit of the physiological norm by 0.11%–0.48%. The exception was only sows of the second half of fertility from the farm of Zolochiv district and lactating sows from the economy of the Staryi Sambir district, where the index of IRI was at the level of the upper limit of the physiological norm, but did not exceed it. The phagocytic activity of neutrophils ranged from 38.68% to 63.05% and did not exceed the physiological norm. The index of phagocytic number in all groups of sows corresponded to physiological norms. Exceptions were sows from the economy of the Staryi Sambir district, the indicator corresponded to the value of 3.44, which is 0.56 less than the lower limit of physiological norm.