EN
The levels of luminol enhanced chemiluminescence in samples of udder secretion and blood taken from healthy cows as well as from cows with subclinical mastitis were examined. Luminometer 1251 and computer programme LKB Pharmacia were used to conduct the study. The spontaneous and zymosan inducted chemiluminescence was directly related with the somatic cell count in milk or PMNs count in blood. However, the capacity of single cells for to creating reactive oxygen metabolites in milk from healthy cows and in blood taken from cows with the subclinical form of mastitis was the highest. The coefficient (mV/10⁵ milk somatic cells or blood granulocytes) of both spontaneous and zymosan inducted chemiluminescence was the lowest in secretions taken from clinically inflamed udders.