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Immunodeficiency. Immunodeficiency, also known as immunocompromisation, is a state in which the immune system 's ability to fight infectious diseases and cancer is compromised or entirely absent. Most cases are acquired ("secondary") due to extrinsic factors that affect the patient's immune system. Examples of these extrinsic factors include ...
The immune system is a network of biological systems that protects an organism from diseases. It detects and responds to a wide variety of pathogens, from viruses to parasitic worms, as well as cancer cells and objects such as wood splinters, distinguishing them from the organism's own healthy tissue. Many species have two major subsystems of ...
The complement system is part of the innate as well as the adaptive immune system; it is a group of circulating proteins that can bind pathogens and form a membrane attack complex. Complement deficiencies are the result of a lack of any of these proteins. They may predispose to infections but also to autoimmune conditions. [7]
An opportunistic infection is an infection caused by pathogens (bacteria, fungi, parasites or viruses) that take advantage of an opportunity not normally available.These opportunities can stem from a variety of sources, such as a weakened immune system (as can occur in acquired immunodeficiency syndrome or when being treated with immunosuppressive drugs, as in cancer treatment), [1] an altered ...
List of autoimmune diseases. Dermatosis in Crohn's disease. Demyelination in MS. PAS stain of lupus nephritis. Autoimmune urticaria. Proptosis in Graves' disease. This article provides a list of autoimmune diseases. These conditions, where the body's immune system mistakenly attacks its own cells, affect a range of organs and systems within the ...
Immunology is a branch of biology and medicine [1] that covers the study of immune systems [2] in all organisms.. Immunology charts, measures, and contextualizes the physiological functioning of the immune system in states of both health and diseases; malfunctions of the immune system in immunological disorders (such as autoimmune diseases, hypersensitivities, [3] immune deficiency, [4] and ...
An immune disorder is a dysfunction of the immune system. [ 1] These disorders can be characterized in several different ways: By the component (s) of the immune system affected. By whether the immune system is overactive or underactive. By whether the condition is congenital or acquired. According to the International Union of Immunological ...
However, several factors can contribute to a disease, such as trauma to the ear, water sports and a weakened immune system. Fungal infections can cause itching and discomfort and also create ...