Estimation of cows organism protection nonspecific factors in the conditions of agroecosystem of Middle Volga region

Оf cows kept on the territories of Middle Volga Regions polluted with heavy metals there were established the signs of immunodeficiency of cellular chain of immune system. The decrease in number of monocytes, T- and B-lymphocytes and increase of slow-differentiated O-lymphocytes were noted, neutrophiles’, and besides phagocytosis reaction and neutrophiles’ activity were decreased.