It is term used as a convenient description for all phases of the disease caused by a bacteria called Brucella. Many names have been applied to it as: 1. Malta fever 2. Mediterranean fever. 3. Gibraltar or rock fever 4. Undulant fever
• Viral hepatitis is a group systemic infection affecting the liver predominantly caused by 5 kinds of viruses at least • Five hepatotropic hepatitis viruses are responsible for the vast majority of hepatitis cases(classical) : Hepatitis A virus (HAV) Hepatitis B virus (HBV) Hepatitis C virus (HCV) Hepatitis D or delta virus (HDV) Hepatitis E virus (HEV)