Substances that cause an allergic reaction.
The body's exaggerated immune response to an internal or surface agent.
An extreme, life-threatening systemic allergic reaction that may include shock and respiratory failure.
The act of injecting venom.
A substance produced by the body (commonly called adrenaline), and a drug produced by pharmaceutical companies that increases pulse rate and blood pressure; the drug of choice for an anaphylactic reaction.
Substances released by the immune system in allergic reactions that are responsible for many of the symptoms of anaphylaxis, such as vasodilation.
The body's response to substance perceived by the body as foreign.
The body system that includes all of the structures and processes designed to mount a defense against foreign substances and disease-causing agents.
The study of the body's immune system.
Chemical substances that contribute to anaphylaxis; released by the immune system in allergic reactions.
A high-pitched noise heard primarily on inspiration.
A poison or harmful substance produced by bacteria, animals, or plants.
Small spots of generalized itching and/or burning that appear as multiple raised areas on the skin; hives.
A raised, swollen, well-defined area on the skin resulting from an insect bite or allergic reaction.
The production of whistling sounds during expiration such as occurs in asthma and bronchiolitis.