Impact of a Low Level Laser Irradiation (LLLI) On Several Blood and Productive Parameters of Fresh Dairy Cows

The objective of the research was to find out the effect of LLLI irradiation on cow physiological and productivity parameters at the peak of lactation. For the purpose of the trial, a total of 40 clinically healthy cows were grouped in the following 2 groups: test (n=20) and control group (n=20).Twenty cows in the test group were exposed to laser irradiation for 30 seconds daily for 8 continuous days. Blood and milk samples were collected three times: before starting the trial (before irradiation), at the end of the trial (after 8 days of irradiation) and 14 days after the end of the trial. LLLI irradiation for 30 seconds (8 consecutive days) at the peak of cow lactation had no effect whatsoever on changes in the total blood protein content, aspartatamine transerase, leukocytes and phosphorus parameters in both the test and control group, however, the calcium concentration in the test group was found to remain stable over the entire course of the investigation.Was found to cause a statistically significant decrease in SCC in the test group as compared to the control group, and a statistically significant increase in milk protein content in the test group when compared to the control group.