BRUCELLOSIS > 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. 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