duty. 1  something that one is expected or required to do by moral or legal obligation. 2  the binding or obligatory force of something that is morally or legally right; moral or legal obligation. 3  an action or task required by a person's position or occupation; function: the duties of a clergyman.
Familial Mediterranean fever is an inherited disorder that usually occurs in people of Mediterranean origin â including Sephardic Jews, Arabs, Greeks, Italians, Armenians and Turks. But it may affect any ethnic group. Familial Mediterranean fever is typically diagnosed during childhood. While there's no cure for this disorder, you may be able to relieve signs and symptoms of familial Mediterranean fever â or even prevent them altogether â by sticking to your treatment plan. 1  Symptoms.
A parasitic disease is an infectious disease caused or transmitted by a parasite. Many parasites do not cause diseases. Parasitic diseases can affect practically all living organisms, including plants and mammals. The study of parasitic diseases is called parasitology.erminology [edit]. Although organisms such as bacteria function as parasites, the usage of the term parasitic disease is usually more restricted. The three main types of organisms causing these conditions are protozoa (causing protozoan infection), helminths (helminthiasis), and ectoparasites.