In this study , it was aimed to isolate some Bacteria from some pulmonary lesions of various pathological conditions occurring in the lungs of cows. For this aims ,samples of the investigation were obtained through the examination of a total of (660)cows ranging from 3 to 10 years of age were examined for lungs affection during the period from November 2006 to July 2007 .Out of these samples ,(148) lung ,constituting (22.4%)suspected for abnormalities were selected . The encountered pulmonary lesions which found in our study were (148) cases (22.4%), included 11 various type of pulmonary lesions associated with bacterial isolation. Escherichia coli being the most frequently isolated organism and the number of it's isolates was (68), constituting (34.9%) of the overall number of isolates. The various bacterial isolates with different pulmonary lesions are mentioned and it's significance is discussed.

This article is devoted to a problem of biochemical interaction of selenium and antioxidational system of animals and people organism. The problem we have touched is about the efficiency of influence of organic and inorganic taking place on subcellular level. The advantages of organic selenium are proved, the degree of its bjochemical influence on an antioxidationi status of health are indicated.