Early stage of human immunodeficiency virus (HIV) infection in which mild symptoms of infection is present.

Later stage of human immunodeficiency virus (HIV) infection when the cell of the immune system lose their ability to fight off infection.

physician who studies and treats allergic conditions

Reaction due to extreme sensitivity to certain foods, chemicals, or other normally harmless substances.

A severe reaction that occurs when an allergen is introduced to the bloodstream of an allergic individual. Characterized by bronchoconstriction, labored breathing, widespread vasodilation, circulatory shock, and sometimes sudden death.

a drug that blocks the effects of histamine in the body

blood test that determines number of antibodies against cell nuclei present in bloodstream; elevated in autoimmune conditions

a condition in which the immune system mistakenly attacks itself, targeting the cells, tissues, and organs of a person's own body

A group of hormones, including cortisol, released by the adrenal glands at times of stress

cells capable of physically attacking and killing pathogens or diseased cells

inflammation, obstruction, and destruction of the lymph vessels resulting in enlarged tissues due to edema

blood test for an antibody to AIDS virus; positive test means person has been exposed to virus

common name for appearance of wheals during allergic reaction

cancer of the lymph. very curable in early stages also called Hodgkin's Lymphoma

having an immune system that is unable to respond properly to pathogens.

medication to block certain actions of immune system; used to prevent rejection of transplanted organ.

a localized physical condition in which part of the body becomes reddened, swollen, hot, and often painful, especially as a reaction to injury or infection.

type of skin cancer often seen in patients with AIDS; consists of brownish-purple papules that begin in skin and spread to internal organs

condition caused by the Epstein-Barr virus and characterized by an increase in mononuclear cells (monocytes and lymphocytes) in the blood along with enlarged lymph nodes (lymphadenopathy), fatigue, and sore throat (pharyngitis)

cancer of the lymphatic tissues other than Hodgkin's lymphoma

infections seen in patients with compromised immune systems

opportunistic infection common in immunodeficient persons; caused by fungus Pneumocystis jiroveci

autoimmune disease with fibrous lesions forming in lymph nodes, liver, skin, lungs, spleen, eyes, and small bones of hands and feet

type of allergy testing in which body is exposed to allergens through a light scratch in skin

caused by diverse genetic mutations that lead to complete absence of all immune function

a chronic, systemic autoimmune disease that may involve connective tissue and many organs; common symptoms include butterfly rash, arthritis, and photosensitivity

allergic reaction of the skin characterized by the eruption of pale red, elevated patches called wheals or hives

injection of a weakened or mild form of a pathogen to produce immunity

blood test to detect various antibodies in bloodstream such as HIV antibodies; considered more precise than ELISA