[Effects of the oxitetracycline in the increase of the packed cell volume of cows milk jugs during outbreak of bovine anaplasmosis].

This research was performed to study the effects of oxytetracicline L.A., in unique dose, in the reconstitution of the packed cell volume (PCV) from animals clinically affected by anaplasmosis. Were utilized 152 Holstein Frisian Cows, of first lactation with age group varying between three and four years old. The animals were classified according to the presence of Anaplasma marginale in the circulation and percentage of PCV as: chronic infection (PCVe24%) and clinical (PCV<23%) constituting groups of 117 and 35, respectively. The animals with clinical infection were treated when detected the parasite by microscopy examination in stained thin blood smears and when the PCV were less than 24%; the animals with chronic infection were not treated and maintained like group control of the infection. All treated animals with 20mg.Kg-1 of oxitetracycline showed recuperation increasing for levels close to the physiological parameters. The animals considered with PCV normal for the category, in the day 0, were not treated and had tendency to the fall. The results reveal the activity of the oxytetraciclyne in the recuperation of clinical cases with anemia by bovine anaplasmosis.