Field investigation on some major and minor elements changes following respiratory and digestive disturbances among calves

This work was planned to study the effect of respiratory and digestive disturbances on some major and minor elements levels in blood of calves. On which a total of 123 Holstein Friezian calves, were used, in age of one day old up to 180 days. Those animalkept in El-Salhia Agricultural Project for Development and Investment.The animals were classified as followingGroup I:30 calves of one day old to 180 days were apparently healthy served as control. This group was also, subgrouped according totheir ages into:Subgroup A: 1-60 days old.Subgroup B: 61-180 days old.Group II:48 calves suffering from respiratory affections were dividedaccording to their ages into:Subgroup A: one day to 60 days old.Subgroup B: 61 days to 180 days old.