The effect of the red blood cell system disorders on the further development and productivity of Holstein calves that had had bronchopneumonia

The aim of this research was to study the effect red blood cell system disorders on further development and productivity calves that had bronchopneumonia. included 170 Holstein heifers at age 180-195 days: healthy (n = 92) with moderate bronchopneumonia 78). All animals been under constant clinical supervision for 27 months. Blood sampling performed in 10 from each group beginning experiment day 22, also when they reached a body weight 380 kg (the first artificial insemination), 30 days before planned calving date, 7, 90, 180 lactation. samples obtained were examined by hematological analyzer, content fetal hemoglobin determined Singer’s method. It shown after completion course treatment symptoms disappeared calves, but microcytic hypochromic anemia appeared. Further, these an increase registered fruitful fertilization 10.8% insemination index - 36.7%. After during lactation, severity hypochromia decreased, there tendency macrocytosis, which, combined increased anisocytosis, indicated hypoplastic anemia. This form occurred against background pathological residual changes pneumonia due depletion compensatory potential bone marrow its functional overload operational revealed lactating cows caused decrease milk 23.2-26.7% (P<0.01).