Abstract:
The scientific investigations revealed in this research present the objectives of studying some immunological aspects of the phagocytic activity in immunity regulation in the neonatal period of the new-born calves at the age of 5, 10, 20 and 30 days. As a result of the immunological investigations were revealed various indexes which characterize the activity and intensity of the phagocytic activity, which varies at different age periods. The dynamics of these indexes demonstrates that in the neonatal period, at the calves aged of 5 days, the phagocytic activity constituted 52.33 ± 0.60, compared to the age of 10 days, which constituted 41.67 ± 0.65, which shows a decrease expressed by various aspects of external factors, which acts on the newborn animal in the first days of life. The values of the phagocytic activity at the age of 20 and 30 days constituted 38,56 ± 0,56 and 35,44 ± 0,47, which confirms the decrease of the phagocytic processes at the animals. From the obtained results, it is noticeable that the phagocytic intensity at the neonatal animals at the age of 5 and 10 days determined significant values which constituted 2,32 ± 0,02 and 1,83 ± 0,01, compared to the animals at the age of 20 and 30 days, where these values constituted 1,78 ± 0,01 and 1,57 ± 0,01. The results of the research demonstrated that at the neonatal animals the defense mechanisms are not sufficiently triggered in order to protect against the microorganisms, viruses and other pathogenic agents aggression.
