Other Names:
Analphylactic reaction
Anaphylaxis is a rare and severe allergic reaction that causes symptoms such as shock and bronchospasm. It may be a complication of immunization. It may also be an abnormal response to an antigen (a foreign substance, usually a protein) that does not bother most people but elicits symptoms in those who have an inherited hypersensitivity to it. Well-known antigens that can cause anaphylaxis include penicillin, insect venom, pollen extracts, fish, shellfish and nuts.
Anaphylaxis is one of the rarer events reported in the post-marketing surveillance system for vaccine adverse events. Based on the five years of complete data between 1990 and 1995, in Canada the annual rate of anaphylaxis ranges from 0.11 to 0.31 reports per 100,000 doses of vaccines distributed.

However evidence compiled in 2001 indicates that up to 15% of those in the USA are at risk for this condition, which was once considered a rare event. Researchers say that anaphylaxis can be triggered by food, insect stings, drugs and latex. They found that nearly 10% of the known cases of anaphylaxis were triggered by penicillin, 0.5% to 5% by inset stings and 0.0004% by food. Based on the 1999 US population of 272 million, the population at risk for anaphylaxis from penicillin is nearly 27.2 million, from insect stings is 1.36 million to 13.6 million, while only 1,099 cases of anaphylaxis were caused by food allergy.

Broader Problems:
Risks of immunization
Related Problems:
Medicine Physiology
Problem Type:
G: Very specific problems
Date of last update
04.10.2020 – 22:48 CEST