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, also known as parasitosis, 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. Some parasites like Toxoplasma gondii and Plasmodium spp. can cause disease directly, but other organisms can cause disease by the toxins that they produce.