Studies on role of Enterobacteriaceae in newlyborn Friesian calves diarrhoea in Assiut and Quena Governorates [Egypt] with special reference to their sensitivity to some antibacterial agents

antibiotics antibiotique antibióticos bactericidas bactericides bactéricide calves cows diarrea diarrhoea diarrhée egipto egypt enterobacteriaceae resistance to chemicals resistencia a productos químicos résistance aux produits chimiques ternero vaca vache veau égypte