One hundared and thirty newly born Freisian calves were included in this investigation valves classified according to the severity and nature of the illness into the following:
1- 60 clinically healthy freisian newly born bronchopneumonia. 2- 19 Freisian calves showing signs of severe bronchopneumonia. 3- 32 calves suffering from milk broncho-pneumonia. 4- 19 calves showing signs of pneumonia associated with enteritis. The main clinical signs were noticed in all diseased calves. The clinical finding of acute broncho pneumonia in newly born freisian calves were dyspnoeic respirations and severe fever while in the 3rd group the clinical signs were less severe than the 1st group < /strong>. In the 4th group (pneumo-enteric calves) the clinical signs were dyspnoeic and respiratory distresses which were usually associated with signs of diarrhoea in different degrees.
There were a marked decrease in mean values of blood pH in calves with acute broncho-pneumonia also in mild cases of broncho pneumonia. Marked drop in mean value of blood pH was observ ed in group IV. PCO, values were increased in all cases of broncho pneumonia. The mean values of HCO, were slightly decreased in calves showed pneumo-enteritis. Also mean values of sodium and chloride were decreased.