MAMMARY GLAND STRUCTURE AT COW SUBCLINICAL MASTITIS
Morphological and functional characterization of mammary gland structure in cows with subclinical mastitis is described in this article. At this pathology, mammary gland structure develops an increased parenchyma microvasculature, dystrophy of alveolar secretory cells and also integrity damage of alveolar lining. Mammary ducts and alveola were filled with serous and cellular exudate containing both epithelial and somatic cells. Clinical trials showed that in cows with subclinical mastitis a mammary gland was of tough consistence, supramammary lymph node was slightly increased. Histological study demostrated that alveoli are predominantly polymorphic with varying size and contain serous liquid with abundance of fat and dairy impurities. Epithelial and somatic cells with ultrastructure within a normal range were found in some alveoli lumen. In the alveoli, serous fluid contained plenty of fat impurities.